The short version is this: these are good quality thumb-picks which fit comfortably and give a good sound. If you want decent thumb picks at a very reasonable price, these will do you very well.
A slightly longer version if you're interested: they are a bit flashy and over-sparkly for my taste, but that doesn't affect the performance at all. Also, with any thumb-pick the blade may not be exactly the right length or shape for you. I always find them too long (which is a purely personal thing, but these were very easy to trim with a penknife and then smooth and shape with a nail-file to exactly the length and shape I find comfortable, so if you find the same it's easy to customise these. (You get three in a pack, too, so that if you make a mess of one, there's always back-up.)
Anyway, that's probably more than you needed to know. The bottom line is that these don't cost much and work fine.