PonyGirl is an exercise in "great concept, bad delivery." There aren't a lot of pony fetish sites out there, so it is too bad that this one is disappointing.
Since this is a fetish site don't expect to see any hardcore or even very much nudity. In fact, there really isn't that much to look at here. There's a scant 10 videos, which is hardly enough to keep most people glued to the site.
The vids can all be downloaded and watched in excellent-looking Windows Media and good-quality MP4 files. There is also a portable option and a streaming option.
Besides the lack of content and the fact that they haven't updated in over three months, the problem is that not all the content is theme related. There are a few scenes that are BDSM/Latex fetish but not pony.
I really wish I could tell you more, but that's all there is to this site. The only thing that justifies the cost of admission is the 63 bonus sites and over 5,000 videos. These are filled with a much larger number of hard and softcore pics and vids. None of that content has anything to do with pony fetish action though, although, there is a reasonable amount of bizarre/BDSM fetish material.
This will probably be a pretty disappointing site for anyone who came set on satisfying their pony fetish desires.