Just recently started playing this, although I made an account a few months ago. I'm enjoying leveling atm, and have managed to scrape together 4 heroes to play with.
Thing, Daredevil, Thor, and Wolverine. Got Thor from a random hero splinter box, and Wolverine from a free box giveaway from OnRPG.
Only negative for me is that there are so much crafting stuff, and items you need to store, you really need extra storage to put it all in ( I have over 30 different runes alone ), then there are all the relics, elements etc. Even worse is that all the inventory is shared, so half my inventory has items for my other heroes (just as well I only have 4 atm).
I suppose its the same as many of these ftp games, in that they try and force people to buy storage. In some ways you can't really blame dev's for trying to pay the bills. It's a pity there appears to be no option to swap splinters for storage.
Was nice getting a free stash from the anniversary gift, although I filled most of it from the contents of the anniversary gifts