I found this book to be interesting as far as it goes, and while I wouldn't object to reading more in the series, I'm certainly not going hunting for them. If I run across one later on, fine, I'll read it, but this just doesn't fit what I like to read.
Sure, there was lots of action, and sure, there's a seriously overpowered hero that can tank with the best of them, but that's basically all that happens here. If you like lots and lots of action, and no plot, then sure, have at it. If you're looking for actual world development, plot progression, and something meaningful other than useless violence, then you'll need to look elsewhere, because this book doesn't have it.
I suppose everyone wants an escape once in a while, and this book is great for that, but I personally like to have something useful after all is said and done, and while this book hints at that, it doesn't really deliver on it. It was certainly an interesting read, but not truly my cup of tea.