This is a really great filament. I use it exclusively in my Lulzbot Taz5. It has great temperature performance, and it consistently produces reliable prints.Only once (out of many repeat purchases) did I receive a sub-standard roll of filament. I could tell it wasn't the normal quality because the finish on the filament was a dull, matte finish rather than the usual glossy finish. Being the optimist, I tried it anyway, and it gummed up my nozzle pretty quickly. Lesson learned, shouldn't have tried it when I knew it was probably not going to work.That being said, around that time (just a day or two after I received the shipment) the company contacted me and asked for feedback. I gave them my candid remarks, and in pretty much no time at all they sent a replacement roll of filament.Their customer service is really top notch... a lot of other companies could take a cue from them. :)Without reservation I highly recommend this product -- great performance, great supportUpdate to review below about the filament being very brittle. the company recently contacted me and said that I receive a bad batch and have sent a replacement. This moved them from a 2 to a 4. Every company has will have problems but its nice to find a company proactively will resolve an issue. Way to go IC3DThe filament is very brittle, I have only used about 1/4 of the roll and it has broken at least 1/2 dozen times. How brittle will the items I make be? Will not purchase again.Let me start this by saying I use a high volume of filament for my business. Because of this I have tested many different brands of filament to attempt to find "the one" perfect filament. I saw IC3D's filament as a good American made product that I could stand behind. That is, until I got it in the mailRight off the bat, the filament was sealed in the box, but I noticed inside the wrapping the spool was covered with dust. Dust and a 200+C hotend do not mix. So I took the spool and blew it out with compressed air next to my HEPA filter to keep it from blowing around the room, and decided to give it a shot...Don't ask me how they achieved this, but when I print with this black there are spots of matte finish, and spots of gloss. I have never in my 3D printing career seen this happen with even the cheapest Chinese filaments. Also the dimensional accuracy is definitely out of spec on both of the rolls I purchased, which makes my Ultimaker 2+ very cranky and constant adjustment of the filament feeder is needed.So, aside from the jams, the patchy finish, and poor QC, this filament is almost as good as the chinese equivalent, and costs 50% more! What a bargain...needless to say, I will not be purchasing from IC3D again. Use at your own riskI purchased this for a series of long prints on one of my Lulzbot TAZ printers. I've used about 1lb out of it so far just trying to get it to print right.1) Dimensional accuracyIt's so out of spec that even live extrusion adjustment with a width sensor only marginally improves the prints. Based on the extensive measurements I've taken, it's true width is ~2.85 but that wildly varies +-0.2mm. Absolutely unacceptable and mostly unusable. 2) PackagingIt (and the descant) was water laden when it arrived and needed to be dried. Since it's 5lb of filament, it took about 30 hours at 120 degrees. I did print with it before drying and it was a joke. Popping during extrusion, poor finish, and no tolerance for bending.3) TemperatureThere is no way it will print at the suggested 190-200C. My printer has historically been a workhorse with a bed that needs little to no adhesion assistance. However, this filament needs at least a 55C bed temp and 210C extrusion temp.At this point I'm tempted to just throw the whole thing away, but I'm determined to get some use-able prints out of it. Using this filament has been the most frustrating printing experience I've had to date.Oh god were do I begin.I only tried PLA 3mm I wanted to try ABS but now with the bad results I got I don't have the motivation, I am going to review this filament on my Youtube channel and live print and compare it with other PLA as well but for here this is my review:1. its inconsistant with its diameter, the tolerance of error is very large it can go from 2.90mm to 3.5mm at times, I hardly had consistency with this PLA.2. it does not print good quality and warp as if it was ABS, I found that weird but I have pictures to back me up.3. it variate very quickly to temperature change, I usually set 210 for PLA and this brand either don't flow good less than 205 or at 210 it start stringing.I printed examples, 2 different brands, white is IC3D and Green is ColorFabb and you can judge for your selfI don't advise you buy this PLA its expensive for the bad quality.and it causes jam in my printer and I have pictures of that as wellFilament quality itself seems decent, well packed, and reasonably bendy. However I encountered several winding problems: the filament was stuck under other filament quite a few times during 3-4 long prints, causing the gripper to fail. Examining the spool reveals that the winding is uneven and some of the filament is stuck under other filament. Bad roll?The first thing I made with this filament was a very high detailed tugboat model. It came out perfect with a smooth finish.More transparent than white, kind of like frosted glass. I was able to use this to make a block that defused an array of LEDs for an electronics project I was working on. Was also very cool to see the internal support structure on larger prints. Extruded at 210 on a 60° bed using my Taz 5. This is my 3rd roll of IC3D PLA and have had zero issues so far.