Which Philips bulbs? I swapped over my entire house (probably 2-3 dozen bulbs) about 18 months ago now and none of them have gone so far. Dimmable, non dimmable and recessed.
As said above though LED bulbs are not all made equal. Some you can dim, some you can't (the latter are usually cheaper) and some flicker more noticeably when they are dimmed, even when they are supposed to be dimmable. Unless you're going for really bright bulbs your standard 60w equivalent (around 800 lumens) will be the same size as a normal incandescent.