I've had two varieties:
An example of Sprawl V-Flex shorts. I have had this pair for a long time. My grievences are as follows:
1. The flexable material is only along the inner thigh and groin area. This lack of mobility is annoying and FEELS like it effects mobility. However I'm not sure it does.
2. The split along the outer thigh is very small for my taste making a low stance of even sprawl more difficult than it should be.
This is an example to Title's quad flex design. These shorts are newer to me and I have yet to find a single imperfection to the design.
1. The shorts flex in all directions because they are made of a material that gives fractionally, rather than simply the canvasy material most are made from. This makes ANY and all positions completely comfortable because no matter how far your body stretches in any direction, the shorts flex accordingly.
2. The slit along the outside of the thigh is about 3-4 inches high, gives the shorts a slight Thai-ish look, which is very astetically pleasing to me and helps with my stance which can sometimes become rather low.
I recommend a quad flex design, not necessarily Title's (I believe Hyabusa makes a quad design), but I am definitely a proponent of the Quad flex or V-Flex design.