It uses the same engine as KB, IMHO - and I never had a problem with that engine. Graphics aren't everything.
I am not playing it though for the simple reason that I don't enjoy MMOs.

It looks more childish than KB. Graffics arent everything sure, but MMO market is big and demanding today, you have really need to have something to draw players into your MMO, this game doesnt have that.

After getting a stronger computer I noticed the crash in Ice'n Fire is greatly reduced. Some of the crashes must be hardware/software update and/or not too good programming regarding graphic card o.l.