Not much English speakers there, very mediocre roads in the city. However, the food is great, life is cheaper then in England, but not as cheap, as it may be at Chiangmai. Or in Scotland.
If you step outside of the centre of Sofia then prices plummet. Near Obelya you are looking at 12Euro for dinner for 2.
Tech scene is thriving. (There are much bigger mountains and better skiing than Scotland as well!)