This is one of my Mental Block puzzles. They are not as rare as my 7x7x7 V-Ball for example but I have still only ever made around 25 or so since I began making them back in 1996.
I used a genune Mefferts Skewb as the core and all work was done by hand including the stickers. No CAD or 3D printing.
Along with my Container puzzle this is one of my favourites. It's always nice when a puzzle comes out well and you don't have to list a load of faults.
Since all my Mental Blocks are identical I re-used photos and video from a previous auction. Let me know if you need to see a photo of the actual one I am selling. I haven't taken any but would be happy to if you request it.

Movement / Quality
Very smooth movement and great quality in general. Slightly large though nice and light.

Appearance
Very good. 

Construction
 Custom made / Mod / Transformation of a genuine Mefferts Skewb.

Durability
All custom made puzzles should be treated with care. This one however is pretty strong. I guess it could crack or come apart if dropped but it should stand up to normal use.
The signature is protected with a clear covering.