I recently bought that cage for my piggies too. They were in a Nero 3 before which was a bit too small but I couldn't find anyting bigger in the shops. We were planning to build a C+C cage but as we'd just moved house had far too much else too sort out!
Anyway went to Notcutts one day just to get some bedding for the guineas and saw that cage and had to get it for them as looked so much bigger and nicer than there old one. Funny thing was as we're only a few minutes from Notcutts and only have a small car we decided to walk home and carry the cage rather than go to all the hassle of folding down car seats etc. Never got so many weird looks before, well not until the week after when we saw some cute topairy animals there and bought a squirrel and a rabbit, all people could see was this rabbit and squirrel with legs walking down the road! ;D
The cage definitely got the paws up from the guineas though, they seem a lot happier now and run around a lot more than before. Plus I don't worry that they haven't got enough space to play in when I'm at work.
my piggies didn't like the yellow hidey house, so I took that out and added some more levels, but i know what you mean about it been big.
Mines gonna have 3 in it but they'll also have access to a run and they'll be out in my room on the bed when its not nice enough to go outside