I've been using them for over 6 months now and love them. They turn on instantly, are a very nice warm yellow color (ie not bluish), put out a lot of light and work well with my recessed lights. I bought the big ones first which didn't fit so make sure you measure your recessed lights correctly. If you have any questions, be sure to buy one of these to see if they fit before buying others. I've also seen recessed lights that won't accept these types of lights because they're sloped, but mine have straight sides so the little metal clips holding them in place can easily apply pressure and keep the lights in place . Since my old compact fluorescent bulbs broke, I replaced them all with these.
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