We did our first Canvas Holiday this year and a thoroughly good time was had by all.
We went for the classic van for four of us and TBH the cramped conditions took a bit of getting used to. Yes, I know it was a caravan, but I've been in much more spacious ones. Anyway I've been looking at their other offerings and they don't seem that much different, from the floor plans.
What are they really like and are they worth the extra money?
We've stayed with Canvas on many occasions and the last 2 we've had a Deluxe and a Select Plus. IMO, they are well worth the extra money. The main place you notice the extra room, is the fact that you can actually walk round the double bed! The lounge area is also a lot lighter and spacious, even with a separate table and chairs. Still find the bathrooms are quiet cramped and have been known to use campsite showers rather than the caravan ones.