It'd be hard for me to recommend the phone to everyone. I think if you use your phone a lot, the battery life may be an issue for you. Also if you're a purist and prefer things close to what Google's guidelines are, then this probably isn't the phone for you. IMO if you need to install a launcher to the phone, then it's already failed on it's UI. I'm running Google Now launcher and there's no way I could go to using Touchwiz full time. It's just atrocious to me.
Though if you're after a great screen and camera, it has that. The phone to me is a surprising mixed bag. Some things about the S6 I really like and others I really don't.
I don't think anyone would really be disappointed with the phone if they purchased it, but I think people who value certain aspects of a phone very high may have issues with it. However I'm always reluctant to recommend things because things I value in a phone may not be what others value, or things they value I may not care about.
I'd like Samsung to focus more on the software with the S7. Really push hard to make the next Touchwiz a really great UI to use.