Hi Suzy,
I think almost everyone who has used the product has loved them (especially the ones with the magnetic beam spreaders). Initially they perform really well. The problem starts happening later when the color starts shifting. It can take a couple of years. Unfortunately we purchased quite a few over a period of time and as the shifting progressed we ended up with a whole range of yellowish colored lamps. It became a color matching nightmare! It could be that our old Lightolier fixtures have particularly bad airflow. I don't know. There seem to be a lot of variables. Good luck! I hope yours keep working well for a long time!
ashley