It varies for me. Some issues are great but others can look a bit too cartoonish or rushed for my liking, Ends Of The Earth springs to mind.
I've learned not to moan too much though. I hated Sal Buscema's art for ages on Spectacular, then something must've clicked in my mind and I loved it. Complete opposite happened with Todd MacFarlane and Mark Bagley's work, so it's all subjective really.