Prints like a dream 80c bed with pva and 265 Nozzle temp. Using it to print gears for differential in RC buggy, the parts are ridiculously tough, durable and accurate with great layer adhesion. The surface is slightly rough but not abrasive.

This filament is definitely one of the strongest I've ever printed with. I first had trouble getting the part to stick down after using blue tape so I switched to PVA with a bed temp of 70 degrees and a nozzle temp of 260 degrees after which point, the part was stuck down really well but still popped off easily once finished. Depending on the application required (mine was for an airplane oil separator) then it's definitely worth the larger price tag however it wouldn't be suitable for everything due to it's much rougher surface finish.

Overall, I was extremely pleased.

I found it do be an amazing material - incredibly tough, rigid, and seriously heat resistant.
I trialled the material first with some heated-bed clips (http://www.thingiverse.com/thing:1802486) for a few weeks at temperatures up to 120degC, with no discernible distortion.
Then last night, I started building the project from Thingiverse "CTC XY-Shaft Replacement for 24mm LM8UU (http://www.thingiverse.com/thing:949098) to see how this would work out for me. I am really impressed.
The attached photo of the carriage does not really do the material justice as I cannot finish tidying the print until the Igus bushes arrive, but I wanted people to see just how amazing this stuff is.

Heated bed (110degC) with Kapton film applied to glass.
My extruder was set to 265degC, 0.2mm layer height, through a 0.4mm nozzle, 33mm/s, 30% Full-Honeycomb infill, with five top+bottom+shell layers.
I would recommend using a 0.4mm or larger nozzle as it is a tough material. Also, you might seriously consider replacing your nozzle with something much harder than brass - steel/stainless steel (or brass with a hardened coating), as it it will wreck a brass nozzle after a few hours of printing.

Things of note (positive) -
Very tough - strong in the printing plane and its transverse.
Heat resistant.
No obvious print distortion, during or after printing.

Things of note (negative) -
Nothing really serious, apart it not being very good at bridging distances greater than a few millimetres unaided, and it can be hard to get a finely-detailed printed surface.
Abrasive - will eventually kill a brass nozzle.
It could be cheaper, but then I feel you really do get what you pay for here.

Conclusion -
A superb quality material that is easy to print, adheres VERY WELL to Kapton, and is structurally superior to any other material I have used thus far. Think older "Land Rover" and not so much more modern cars. I am eager to try to make other parts with it to see what it can do.