A couple of years ago, I bought a used Leica R7 with a few lenses, after having owned an Olympus OM system for almost 20 years. I was immediately impressed with the R7’s build quality, ease of use and comfort. The R7's mirror and shutter were well d&ed and emitted a quiet but very solid "ker-lunk". Holding the camera gave a feeling of quality and solidity that's hard for me to describe. The results I got with it were very pleasing, too, although that’s probably due more to the superior R lenses than to the R7 itself.
The R7’s exposure and metering modes were: manual (spot), aperture priority (spot), aperture priority (integrated), shutter priority (integrated) and variable program (integrated). The camera offered TTL flash control, with fill-flash capability in shutter-priority and program modes. Mirror lock-up was possible but required the use of a secondary cable release or a stiff pin, to set the mirror lock.
The R7 had no matrix metering and its fastest flash synch shutter speed was a rather slow 1/100 second but I found that its functionality satisfied my requirements at the time. I preferred it to previous electronic R models (R3 to R5) because the electronics were reportedly new and bug-free. The R7 also had an improved viewfinder display and few sexy additional features (for Leica, anyway!) such as fill-flash, the ability to select intermediate shutter speeds and overrideable DX-coding.
The R7 was, admittedly, no match in features for contemporary top-of-the-range Canon or Nikon SLR models but I’ve never felt the need for such features anyway. I’ve since traded up to an R8 (and subsequently changed over completely to Leica M) but I still have fond memories of the R7. It’s a model that has retained its popularity, which is reflected by its price on the used market.