A while ago i joined but never deposited because it looked considerably more troble than it is worth. I think you can only place bets when the total amount matched is 100 Euros, so you cant bet for smaller amounts, unless you mix your bet with someone else at those odds but it didnt say how you do this or why it isnt done automatically. Coupled with that there was no liquidity at all and so even 0% comm and a Euro exchange, it was useless.
What my half an hour did teach me, and it was almost half an hour just to get this, when you bring up the odds screen for the market you want, manually enter your stake as the BOLD number and the odds as the little text number then select "bet now". I never got that far though.