A little bit of out-of-order reviewing here. I've previously reviewed Grimwood's Arabesk trilogy (quite enjoyable) and Lucifer's Dragon (a bit less mature) before that. Before those, I'd read redRobe and reMix.
Both books have over-the-top violence and over-the-top plots. Both feature a mixture of "high tech and low life", plus the priveleged rich and religious leaders doing weird stuff, in a style tagged "William Gibson meets Quentin Tarantino". I think this is a fair summary! It's all a bit much, to the degree that I did enjoy his later books more - more mature, with only a medium level of violence.
I think I would, depending on the reader, recommend them. They're inventive and fun, in a kind of turn-of-the-millennium, post-cyberpunk, PlayStation kind of way. If you're put off by the violence, read a later book, for a bit less intensity but similar interest.