Ive been using a sigelei 150 for a while now my only niggles are that my atties have scratched the paint off the top and that the 0.1 increments can be a bit annoying but im splitting hairs really. its been a solid mod. dropped it a couple of times still works perfectly and the threads are high quality.
most of the time ive got a goblin or a dripper on it.
the only reason i got it over the 100w is sometimes i like to vape at 80w ish and the 150 gives me a good head room over that if i want to experiment with different builds. the 100w is plenty really, but the 150 isnt as stressed as its nowhere near its peak.