I've had nothing but problems with them. Was on holiday for a few weeks, so set up an account to try to sell Arsenal, Villa, Dormund & Sunderland tickets. Sold the Arsenal ticket for more than I wanted for it (felt like I was ripping someone off) then the site wouldn't let me list the others. Rang and emailed them to try & sort it, but got nothing back.
Have emailed them today to deactivate my account. Will see if they can manage it.
Will go back to the old fashioned way of getting rid of tickets.