I sprang for one based on feedback I saw here, and I've been like a kid with a new toy.
It's NOT high powered, but as long as you're patient and don't try to bull your way through a cut, it does quite nicely. I've almost exclusively been using that ~3/4" wide sawblade. You can plunge it straight into a piece of wood and make a square or even triangular hole with a few cuts.
I did have a door jamb the other day that needed a piece about 1x6" cut out and replaced. I tried the half-circle blade for the rip cut and was disappointed--wound up switching back to the skinny blade. It just didn't seem to cut well at all with that much surface area in contact with the wood.
It handles nicely, and though more power would definitely be nice, it's way ahead of having nothing like that at all!