I use compact flourescents here. One thing that I do like about them is that they take a couple of minutes to reach full intensity, something appreciated if I have to get up in the middle of the night.
OTOH, I do consider CFs to be a transitional technology, in that they do have several real issues:
-They produce UV radiation (needed to 'excite' the phosphorus inside the tube). It's not anywhere near the UV level of sunlight, of course, but it does have a long-tern fading effect on things like pictures, etc;
-They contain elemental mercury, resulting in a haz-mat disposal issue;
-They are NOT the most energy-efficient mode.
Although CFs are much more efficient that incandescents (about 90% of the energy used by incandescents is wasted as heat, with only about 10% becoming usefull light compared to about a 25/75 ratio with CFs), they are not nearly as efficient as light-emitting diodes (LEDs, which produce virtually no heat). Once white LEDs come down a bit more in price, look for them to quickly supplant CFs. LEDs have already replaced most incandescents used in signalling applications and with a lower price can quickly take over the decorative lighting market, too.
BTW, the 'flicker' issue with both CFs and LEDs can be addressed with a proper ballast that cycles at a high enough frequency.
Mike