I had one, kicking myself for selling it lately
The biggest con I can think of may be the price. I seem to recall purchasing my R75 for around $500 new with the DSP - which was an option then - included as part of a promotion. They seem to be going for a lot more now. I sold this some time ago when I simply had too many radios around. I opted to keep my R5000 and let the R75 go. Wish I'd kept both.
Anyhow, while I had the radio it was a great rig. Good sensitivity, nice to have a desktop rig instead of a portable like my DX398 and YB400 I still have, but with some newer features than the R5000 or the Sony ICF-6800W I sold many years ago - same reason I sold the R75, the pile of radios had gotten too large. Also sold my DX390 at the same time as I recall.
If you've never had one and are looking for a good performing but simple to operate desktop rig, you can't do much better than the R75 for the money, even with it being more expensive now than I recall it being new. Anything of that quality or better in a used rig is going to cost you as much likely - JRC5x5, Drake R8/R8B, etc - if not more.