I hd a Kimber Rimfire Target for about a year. It was a pretty good gun, but I found a 38 Super I wanted more and traded it.
I thought the Kimber was neat because it was so light, but figured if I got anything it would be a conversion kit rather than an entire gun. Then I found that used Rimfire Target for not much more than the cost of a convesion unit and got it.
It may be cheaper to get the conversion unit, but having the complete gun is awful handy.
It's nice to be able to just grab the gun and go. I found the same thing with TC Contenders- I had the Contender Carbine stuff for a while (shoulder stock, long barrel, etc) and it was a lot handier to have a second frame to leave the stock on as a "dedicated carbine".
There were a few times when I was able to run out and shoot that Rimfire Target a little bit just because the gun was ready to go and didn't have to waste time putting it together.
I never shot mine from a rest. What testing I did was standing, unsupported, at 15 yards, and shot each round as fast as I got a sight picture after the previous round. What struck me was how consistent it was. I don't see my figures right now, but I shot something like 11 types of ammo, and almost every 10-shot group was around 2". Some were around 1/8" or so more, some about 1/8" or so less.
I've read that some people have had touble with them not feeding. Mine ran fine. I noticed that most of the people who had trouble are a little vague about what ammo they were using, saying something like "target stuff". That definition can mean anything from cheap standard velocity ammo to R50 or Eley Tenex, depending on who it is.
Kimber does say to use Hi Velocity ammo. I tried some Winchester T22 standard velocity out of curiosity, and it worked fine.
Also- I seldom put more than 100 rounds through mine at one time, since I mostly shot mine when I had a little spare time here and there. I would imagine most people ran more though theirs each time, and/or between cleanings. I would think malfs would be more likely as it was shot more, like any other .22.