I did 6 years as a cadet pilot with Air Atlantique, culminating on the ATR.
I've moved on now yes, better job (?), yes, but in my time with the company I flew many different aircraft (primarily for HM Coastguard) which, looking back, was the best flying of my career to date, and probably will remain that.
I have no experience of this RVL group the company has now become, but if they're still doing things the way they've always done, then I'd recommend it. You work hard not just through your training, but beyond that too - it's more of a way of life than a job, but you're given responsibility at an early stage, let loose with some decent aircraft and trained to a level beyond that of what other 'sausage factory' style outfits offer.
I fly the 737 NG now, and if I had the choice of going straight on that after training, or doing the single pilot / turbobprop route, I'd do the latter every time. . . .