Our flat in London was very like this....big old house portioned off into flats.
Pros were: massive bedroom, living room and kitchen compared to a newer flat. Literally double the size. High ceilings, big sash windows, big chunky skirting and coving, really lovely looking place all together.
Really lovely for entertaining, parties, hosting guests etc. Room to move about and flexibility about what we could do in rooms as opposed to friends who really were stuck with how many people they could accommodate.
Cons were: much much bigger heating bills than a modern place, those high ceilings plus old construction = freezing in winter.....
Much more upkeep than a modern place eg roof tiles would come off in quite mild winter storms due to their age and state of repair, so a slightly stormy night to everyone else would quite often be a 5k bill for us (high ceilings = high roofs =scaffolding all the flippin time).
Very poor sound insulation...really easy to overhear conversations etc from the neighbours because as an old house designed for one family no sound insulation between quite thin internal walls. At one point we accidentally bought the same bt handset as our neighbour and had to change it as if we were in another room and heard the landline, we couldn't tell if it was our phone or the neighbours ringing without going to check.
Also share of freehold an utter, utter pain in the arse. One owner didn't really have the money to do anything but the absolute minimum and often then we would have to chase and chase as they simply didn't have spare cash to spend yet the work still needed doing. Another owner was very keen to organise us into restoring everything properly to a high standard eg replastering the whole facade when we couldn't afford to do merely cosmetic work....Its one thing to own an old property that needs a lot of maintenance on your own, but when every repair involves negotiating with other owners who might not have the money, this is a pita, and led to a lot of hard feeling.
We really enjoyed living there as we were young, no DC, quite a lot of disposal income, wanted to have lots of parties etc....we moved out of london after dc and now wouldn't consider a similar set up now, as our priorities have changed.
(Incidentally, we had an equal share of the freehold, but that meant we were leaseholders with a share of freehold, (not sure you can just be a freeholder if only a share??), so we needed a limited company to manage the freehold between us which meant company bank account, monthly maintenance charges, annual returns to HMRC, AGM,s, minutes, freehold insurance paid for between the leaseholders etc etc