I have used hammocks quite extensively, but when I head out West, I use a tent.
My experience with Hammocks has been good. Yes, they can be cool on the underside, however I have been comfortable down into the upper-20s, when using my 15deg down Marmot bag. Bugs can be an issue, but that is obviously dependent on your location.
They are super-comfortable, and I sleep much better in them than I do in a tent. While many tout the weight benefits of a hammock, that gap is narrowing every year. Hammock + tarp/fly + bug netting (optional) + extra insulation (seasonal), can easily reach or even exceed the weight of some of the new tents like the BA Fly Creek.