I've had 2. One was the older heavy 1/2 round, 1/2 octagon barreled "grade 1" version. This one has a straight stock, crescent buttpad, and upper tang on which you can mount a tang sight. The other was a new rimfire hunter version, with lighter profile octagon barrel, pistol grip, and straight "classic/American" style stock with rubber butt. The newer ones do not have a upper tang, so no tang sight mounting option available.
The older rifle only extracts the casing, while the newer one has a ejector that will fling the cases out. I shoot mostly standing, so can't give any data on accuracy other than in my hands they didn't seem to shoot any worse than my other nice 22's. Neither felt real lightweight to me, even the newer rifle with the thin barrel... Winchester's specs say 7.5 lbs but I never weighed mine. The design of the Miroku low walls are different vs the original... from what I've read, they're a pain to disassemble / reassemble if that's ever needed. The triggers are pretty good single stage triggers. I don't remember them being heavy. The action is smooth and I'm a big fan of Miroku quality. The block had very little play and the lever is solid, smooth, and did not rattle (unlike a Ruger #1 I had). The newer rimfire hunter had nice polished bluing.
I really liked the low walls and single shot falling block rifles in general. The awkward thing is given their receiver shape, any optics mounted are going to be much further forward than on your typical bolt rifle. Since I shoot offhand, usually with low power optics, I couldn't mount anything far back enough to be comfortable. There's also the possibility the scope could then get in the way with loading (I used mine mostly with a receiver sight). I think the older guns are best suited to a nice set of tang sights (how I had mine), and I'd look for a scope with extended eye relief or a red dot sight with a newer rifle if I ever got another.