Review on SainSmart 3D Printing Filament: Advanced Dimensional Additive Manufacturing Solutions by Jason Lockwood

I've tried many different types of flexible filament over the years, many with very inconsistent results (paper jams and feeding issues) despite many hours of fine-tuning the print profile settings. When I was successful I had to sacrifice good clean prints and print with a 0.6mm nozzle. But with Sainsmart TPU filament I can print with a 0.4mm nozzle and a custom print profile and had no problems! I was even able to print with support and haven't had a single bad print to this day! The key to printing with flexible filament is to turn off the retract, slow down the filament flow a bit, and print at around 220 degrees. Also, if you have a PEI bed, you MUST use painter's tape to cover the bed, otherwise you may rip the PEI cover off when removing the print. Hope this helps and happy printing!