Anyone use auto lifters? Opinions

I use two different tonearm lifts. The Q-Up is the better of the two which I've used for well over a decade. I do not have a Safety Raiser, but admittedly it looks better. But it also looks harder to position. On my Rega P5, the Q-Up matches pretty well with aesthetically. But the P5 is unique looking with being mostly black with a silver tonearm. The advantage of the Q-Up is that it slides, so it's very easy to make final adjustments where within the run out the the tonearm lifts. I don't think this is a huge advantage over the Safety Raiser, but it is easier. The Q-Up also has a few adjustments to the trigger and the lift speed.

There are two versions of The Lift (a product from Express Machining in San Jose, the guy who makes the Rega upgrade parts) listed on USAM right now, one chrome one black.

@rjamilla- Yeah, the Safety Raiser can be a pain to position, far as holding the height you want, then trying to set the horizontal while tightening the screw. I stretched a tiny O-ring around the body, to hold the vertical adjustment, which massively simplified the procedure. It was a snap to set, after that. Never have had to readjust one and it’s very gentle habits, have been most comforting, given the low mass and seeming delicacy of my Magnepan Unitrac I. It would be hard to trust another design, after so many years of reliable service.

Sleepwalker, I meant a stand alone optical lift you could use on any turntable. 
Jameswei, I see on the internet people put a little strip of the soft side of Velcro on the arm where it contacts the tonearm. I would think that would get rid of the "clunk." I shall see as I ordered one off their web site.

Yes, adding the velcro strip was one of the modifications I made.