Well, I can give you a detailed personal review and some professional review (I'm an optometrist).
As for professional perspective, they are one of the cheapest made lenses, the material is old and cheap, so old that only a few manufacturers work with it and no big brand work with it. Every person is different, some may find these lenses good, some won't. For those who find them good most would not find them better than other lenses, so even the good reviews are not that good, the lenses are just good for the price.
My personal experience with them is that they are ok, I mean if I had to wear lenses for a party or a concert or go out to watch a movie, they are fine, but not for all the day.
What lenses are you using now? I could give you a hint about what lenses to try or something.
If you want I will write a detailed personal review too. I've tried a lot of lenses.