I have noted here in my blog before that I am extremely sun-sensitive, and usually steer clear of using deep exfolating methods in the summer. Follow the directions on the bottle (with any type of AHA or glycolic serum) to avoid getting a sunburn. Effaclar contains a 7.5% AHA-Glycolic Complex, which is strong enough to get the job done, but hasn't left my skin irritated. It tingles just enough to let you know that it is working.
The best part of it all is the price. I have paid upwards of 150 dollars for similar products and not seen these kind of results. Effeclar is costs a little more than 40 dollars, and available at CVS or Ulta. When I factor in the coupon that I used to get the serum, I am amazed that it is possible to get spa-like results from a product I paid 25 bucks for at a drugstore.