I had a series of peels and was pleased with the results. I had some acne scarring from my teenage years and it really lightened them up. I actually might start another series soon, since it's been about 10 years since I last did it.
Chemical peels are the shiznit. I used to get an M.D. brand chemical peel all the time. Loved it. Always followed up with a quality mosturizing serum to help reduce redness and irritation afterward. Some companies don't have a good moisturizer for afterwards. I recommend getting Osmotics' Blue Copper Serum. It really helps in case you have a reaction (which has been known to happen).
Be prepared to "go on holiday" for at least a week if you're going to get one (i.e. not be seen). Any chemical peel that is worth doing is essentially a controlled chemical burn, and your face will need time to regenerate before it looks normal again.
Vitamin C and Glycolic peals are used for rosecea. My ex g/f worked for a dermatologist. Chemical peels were used for acne scarring. Make sure you use a good spf for 6 months to a year after. They gave an RX sunscreen (Forte), but the Doctor there said the high end Neutragena spf 70 worked just as well. She had three treatments and it worked pretty well. He charged 200 a pop, but she paid alot less. I got away easy I never had acne. Alot is genetic. 100% Italian helped me most.
Hope this helps. My big tip is to stay out of the sun unless you wear SPF15. I started doing this years ago and my skin looks better for it - even if I did look like Casper next to my ultra-tan buddies in my younger years.
I've never had one - but know a friend who has done them - a very shiny look right afterward - kind of like Norma Desmond! Seriously though - as I turn 50 next year - it might be something I'd do - - - - - to help me turn back time!