Dont no Transfer time as i fligh into Sofia, But as a intermediate skier you will be fine it caters very well for intermediate. Rila is the main Hotel in the resort, never stayed there but looks good.
prob is I gain either on the outward or on the inward as plodiv flight is from doncaster airport 40 mins from my house sofia is manchester 2hours 30 mins from my house so overall dont really gain either way but plodiv is £60 cheaper.
Have stayed at the Rila. Not a bad hotel, comfortable but a bit dated, the food is typical Bulgarian, lots of warm (they don't do hot!) stews, but always plenty to eat. Great swimming pool and gym. The hotel is always warm, too hot sometimes, especially when the girls come out in the evenings! Don't know what they charge, but they look pretty good!!