Had a really good time. Found some really good restaurants e.g. "Central" in Vlas Square. If you make the effort with the locals, they will cetainly make the effort with you - try saying thank you in their language "Blagadaryuh" - it brings a smile to many a local face!
The weather was fantastic and the beaches are exceptionally clean. Local public transport runs often and is cheap. The old town of Nessebar (a World Heritage Site)is well worth a visit.
You have to appreciate that Bulgaria is still learning and developing its tourist trade, its not Spain or Portugal, it has its own culture and is a great value for money holiday.
Overall - really good and will be going back in the very near future.