I find it very good, we had to replace the bulbs 2 chandeliers and they had 3 bulbs of 40W each for a total of 240W, after replacing one is 18W!
I say try as much even if they are expected to provide the equivalent of 25W and the old were 40 and light is tip top so no need to + they send really good, I am very happy.
So glad that other bulbs were placed in Ikea lamps that still had old CFLs accompanied by their heating time which is not suitable for most uses, and it uses less + and it makes clearly better than ask to +? :)
In fact we no longer use compact fluorescent lamps as bedside tables in this context and only in the latter, the fact that they must be heated is useful not to burst the eyes directly upon awakening.