I went in early june this year with the misses. Sunny beach is i think the main resort and is only approx 30mins from airport. Realy nice with plenty to do for kids and adults. 2 weeks is ample though. Was upper 20's temp wise and cracked 30 couple of times. Very friendly so problems at all. just have to remember its quite a poor country so they will do anything for cash.
Really nice beach!
Watch out for the little pedal-taxis, they rob you! no joke.
I would recomend it though i would say to select as best a holtel as possible utherwise you mite be a bit dissapointed with the food and make sure its central too.

40pence a pint!