I love Reilly's stuff. Of course unlike other authors, he has several different series going on, some active, some not. One thing I like about his novels is that he is not afraid to kill off main characters without warning. Like I said at the top, he drifts in and out of sci-fi at times (see: Temple, Contest, and the current Six Sacred Stones/Seven Deadly Wonders series).
Reilly's been kind of a guilty pleasure, but the last couple have been just too stupidly over the top even before the SF stuff. He's a crap writer as well - too many exclamation points! To show that stuff is (supposedly!) exciting! Boom! But actual good writing would do it better!