They are pretty cheap in terms of costs and this is why I choose them. There is no commission charged when you trade, so you pay only spreads regardless of which account you prefer.
I opted for the one with stp/ecn execution and everything is okay. If you wanna keep positions overnight, then it's not a big deal either, swap rates are within standard values, sometimes they can be even positive, so you earn from leaving positions open overnight.
They provide exhaustive piece of info about trading spec on the site, so come over the section and evaluate everything. I have no gripes to them.