I have never played with a Timney, but keep thinking about them every time I assemble an AR... I just haven't taken the plunge yet. That said, I do have experience with a handful of other AR triggers: the POF, JP, Geissele S3G, and the Hiperfire 24E. I prefer a single stage trigger, as the two-stage triggers I have used feel like grit to me (which probably says more about my trigger actuation than the triggers themselves).
Out of all of them, I probably prefer the JP... though as I understand it, they can be tricky to get right (I sent mine to JP for installation). It has just the slightest touch of creep... the only way I can really detect it is to put a bit of pressure on it, then back off; the trigger will then slightly move forward. Break is crisp, and reset is crazy fast.
Next up is probably the Hiperfire 24E with the full power "auxilary" springs in it. I find that it's very similar to the JP in it's characteristics, but just not quite as dialed in. That is to say that there is just a bit more creep than the JP, the break is almost as crisp as the JP, and the reset is nearly as fast as the JP.
For me, the Geissele S3G (the only Geissele with which I have experience) comes next. As is well documented in Geissele's own description of the trigger, there is a fair amount of pre-travel (creep?) that's just as smooth as can be until SURPRISE!! the trigger breaks. Please don't interpret that as the trigger being unsafe or inconsistent... neither of those adjectives apply to the S3G. I only mean to say that I can detect no stacking or grittiness as I pull through the pre-travel. With practice, it's certainly easy enough to develop the muscle memory to "pre-stage" the trigger right before the break... but understand that it will take practice to get there because there is no real warning ahead of the break. The break it's self is pretty crisp. Not as good as the JP, but probably about on-par with the Hiperfire 24E in my opinion. The reset on this one is (no surprise here) pretty quick as well... as would be expected of a trigger designed for use in three gun competitions.
That leaves the POF. While certainly (MUCH) better than a mil-spec trigger, it feels gritty and creepy by comparison to the other triggers mentioned above. I'll continue to use the one I have, but am not likely to purchase any more... there are just better options out there.
All of the above being said, none of them will ever be mistaken for a good trigger on a bolt gun. Also, this is just my $.02... and it may not even be worth that.