I stayed at Nikki's Temescal apartment with family for a working vacation/business trip.
We liked our stay! It's at the edge of the street grid due to where it gets interrupted by highway 24, but felt much more neighborhoody than we would have guessed it would have. The restaurant district nearby was especially good, actually; lots of good options here. No real supermarket within a short walk, but there were a few smaller market/bodega things around, especially one on Telegraph a bit north of the apartment.
There is a little noise from highway 24 and from BART, but with windows closed this wasn't disturbing, just noticeable. BART doesn't run deep-overnight anyway.
The kitchen was especially good/usable. Washing machine & dryer were modern and worked well. Bathroom was fine.
Bedroom furnishings were Ikea-level, interior walls and doors were a little bit thin. None of this was a problem and about in line with our expectation.
The TV is flat-screen, but it seems to be an early-generation Samsung that doesn't do full 1080p. Again, just for what it's worth, nothing that really fussed us.
The floors are polished concrete with a few area rugs in spots. Hardwood flooring would be a cool upgrade; it'd make the apartment really beautiful. As-was it was fine but functional.
Access to BART is fine -- about a 15 minute walk to MacArthur BART. A little faster if you get yourself a Ford bike membership for the month; there's a Ford bike station right out front.
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In all, we would stay here again!