"Are these SSD's any good?" Please define what is good, what is bad and what is good enough, what means "any good".
The Samsung drives are rated to be the best and fastest, they also have some decent software too, but they are also some of the more expensive. I got a couple of 500gb WD blue ssd's a while back and they seemed to be nice but the software is very iffy, I never did get it to install on an AMD system I built, by that I mean the software installs but it refuses to recognize the WD ssd, which makes it worthless Any SSD you get today will run better than a platter drive, some brand name ssd's have better chips and stored memory for better performance, and they come with a longer (5yrs) warranty. Takes these things into consideration when you make your ssd purchase
From my experience the question about good quality has to be related to a certain model of a SSD (generally of a device)! You are asking about companies, though. Each company (Samsung as well) which is known to have good stuff has also released devices which are simply bad..... Samsung is known to have good series of SSD ATM..anyway this can change in the future as it did with their TVs.... And about wear it's actually still too early to say something about (except 840 series which is 'old' already...) My old OCZ Vertex II has a good wear this I can say now, but OCZ is no more....