I had one.. called it the bad penny! I spent ten years trying to give it away, but it just kept coming back!
ISTR I acquired t in a lucky dip box of M42 stuff. t was, I suppose a reasonably useful camera. Coment about tendency to rip film, resonates though! I recall it happening a couple of times when I gave it to my little bother; I put it down to his ham-fistedness and cheap bulk loaded croaton B&W, but reverse take up on the take up spindle, was probably not the best.
I dontt recall it being particularly heavy, and I used OM10's at the time. It was certainly less brick-like then the Zenit I have kept, and its build did seem rather tiny and imprecice compared to that, the 10, o my loverly Sigma MK1.
Man fripe with it was the curiouse jadlng, with shtter release on the frnt near the lens, and the 'trigger' meter switch.. it wasn't a camera that felt natural to use, or inclined me to make it so.
Lens-wise, I had a couple of M42 zooms that came with it, and left with it when it eventually went! They were rather chap and nasty, M42 having fallen out of favour and the preserve of stak-em-high-sell-em-cheap catalogues by the time any-on was offering M42 zooms, and I cant even recall what they were.
Of the M42 stuff to have 'stuck', I have a pentagon 29 that's quite nice, a Ziess 50, a Helios 135, and a Prinz Galaxy 300, with a couple of converters; mostly used on my Sigma, they are the ones that I chose to keep based on condition, handling and performance, based on buyng lucky-dp boxes whe I went into film, in the days before google!
There's a fair few 135 portrait lenses about, most I think Sigma made copies of the Pentax, and quite a few of them are pretty good... but, with old bargain bucket kit like this, you ar probably down to lucky dip where whether something 'works' is more important than the name on the front and what the lab-rats might have said about it when new.... Have fun! (But I wouldn't invest much until I was sure I could live with that curouse handling!)