My experience with them as a seller :
Might be wrong but I think its the first website i saw without a preview button when creating the thread (maybe its just me, dunno

)
As a new seller u basicaly have no chance getting into the market (if the market is already old and populated) : There is no sticky, no bumps, just some pay to win featured seller which seems to have some requirements aswell.
The standard forum filter is by "most seller reviews" so u can imagine as a new seller u have no chance getting a spot on that front page (trust me its small chances anyone will bother to search in that particular page using another filter)
U cannot just use the usual font codes/layouts copy pasted from other websites and just adapt to their layout, they have their own stuff...
When adding images its absolutely awful, u gotta upload the images to their gallery which bugs alot
When selling accounts they ask for alot of questions they shouldnt normally do
Customer support is awful aswell, takes too long to get the information u ask for...
I dont even want to get into their fees, which are just ridiculous
I know they seem to be very safe from the buyers perspective with that guardian stuff, but for me, i just dont like all the stuff i mentioned above.
Most of the time ppl contact me via their PM system, i send them here for rep check and then we deal directly, with skype support.
As a conclusion, i prefer to stay away from PAs system as much as possible
