I've put them on my last 2 bikes. Definately brighter! The newer ones even let you shut off the flashing brake light thing if you want. Personally, I like them.
Put them on two tears ago and love them. The only problem was the 4-way flashers didn't work with the lights. I had to buy a separate load equalizer to get the 4-ways working properly. I can't remember the brand of equalizer I purchased right now.