BE
I've been using them for a few years and have no real complaints. As others have said, in colder months you'll have to allow a few seconds for them to get to full brightness after you turn them on. In situations where you turn on the light and need it straight away (walk in wardrobes-pantries etc) they can be a little frustrating.
That website you provided seems to be charging exorbitant prices though. I picked up all my bulbs for 4 - 6 AUD (~USD 3 - 4.5) each from retail stores-supermarkets etc for reputable brands. Make sure you shop around.
I use two brands, GE and Philips. The GE's were a bit cheaper than the Philips. After three years I havenŐt been able to tell any real difference between the two brands as yet. I found that in a standard size bedroom-study, where I would have used a 60w incandescent bulb, a 15w fluorescent (75w incandescent equiv) was needed to light up the room satisfactorily. I use 18watters on all the outside lights. Personally I prefer the "warm" globes, but each to their own.
Various State Emergency Service units in Aus have recently switched to fluorescent lighting for lighting up work sites at night, primarily because the lights use a fraction of electricity that the old halogen lights used, so we're able to provide more comprehensive lighting off the one generator.
