I've owned two SL2000Fs, one of the red-button 'demo' cameras and a standard one which came with a second film back as new old stock.
The 'demo' one worked fine, the second one went wrong after I ran it on non-rechargeable batteries (wrong voltage, can cook the electronics). This example also made odd rows of bright spots on the exposures, a known problem due to high points on the film transport rollers. This problem was fixed by AV under guarantee, although the SL2000F does tend to trap dust and scratch films by virtue of its design.
I did appreciate the waist-level finder (which also tended to fill up with dust) but found the sheer bulk of the thing made it a pain to carry around. Handling was improved by fitting the Rollei side grip, but the very fact this accessory existed is an admission of the SL2000's handling deficiencies (in this sense, the SL3000 was better thought out).
Had I really needed to regularly change film types and make series exposures, I might have appreciated the camera more. For most people, a conventional SLR, fitted with a winder/motor only when needed, is the better option.
I found the Rollei 50mm Planar to be very sharp and contrasty. The Rollei-made 35mm Distagon was equally good, and the 21mm Rolleinar was good enough for the limited use I made of such a wide angle objective.
However, I have been much happier with the Leica R4 and Nikon FE I have used since I sold the Rolleis.