we've used them twice
both times we were able to get the holiday for just over £50 more than the flight price with Virgin. This year I could have booked a holiday for our dates for less than Virgin wanted for flight prices on the same dates (this was at the 11 month window as the prices were released). If you're comparing the prices to indirect then no, they're not cheap, but if you want to fly Virgin I think they're competitive (we paid about £700 each for B&B and direct flights over Easter so school holidays, 2 years ago)