I got my parents a Switch[1] bulb for Christmas. If the Cree bulb is anything like it, I'll be swapping out the CFLs I use the most right away--$13 at Home Depot is better than the ~$45 I paid for the Switch. It puts out great light and "feels" better than a CFL bulb. Not sure if it's the ballast frequency, color temp, or the spiky emission spectrum, but CFLs bother me.
1. http://switchlightingco.com/