Was ordering some filament on Amazon and noticed that they now have this SainSmart Flexible TPU filament for $26 per 1KG with free 2 day shipping. Has anyone used this stuff, and how is it? Considering picking some up. They have quite a few color's of it. I've never used any flexible filament yet. It does say in the spec's it's material is 95A, so it is a bit stiffer than say ninjaflex.