I switched from the last beta to Dolphin some months ago because (iirc):

Firefox did not support gestures. It was very slow to start. It did not reflow text (properly or at all?).

At least the reflow seems to be included now so I guess I try again.

edit: Installed it. Tried zooming in on reddit, hn and metafilter. Failed to reflow on all of them. Reflowing after zoom is enabled in the options, at least I think it is (the stupid apple slider shows the yes in blue, I guess that means it is on. Or does it switch on if I press it? I never got the design of those buttons.)

Apparently no way to exit the application.

Takes guesstimated 10 seconds to cold-start. 3s for Dolphin.

Yeah, those buttons always bugged me... the design could have been a lot cleaner.

I'm not sure if Firefox Mobile has the same support for theming that the desktop does, but if so I imagine they'll be some nice themes for it eventually. :)