Wilde Maus is brilliant. Like, really brilliant, smoother than most rides I've been on this year (most of the tat at Blackpool and half of TP's rides). Loved it.
Euro Coaster/Christmas Coaster was really ghetto, bit boring and rough but the first big drop after the mousey section has a real kick to it.
Both of those were £6.
Alpen Hotel was **** BRILLIANT. Like, it's huge. And there's so much there. We kept thinking that'd be it, only to find something else round the corner. £4.
Pirates Adventure was £4 also. Bit odd. Not a patch on Alpen but was still quite enjoyable too with a few jumpy moments.
Went on the wheel (pre-booked) and they were useless at running it, stood waiting for about 25 minutes as the guys on the ride were bored of going round after 3 rotations and actually joking about having to go round again. Luckily a fairly huge queue built whilst we were on it so we only went round the twice which was easily enough. Not really worth it unless it's quiet tbh.
As for the whole thing, I'm split. If you like that sort of thing and can spend the evening drinking, dancing and eating you'll love it. I'd already spent the day walking around London so wanted to get in, do the rides, grab a bite and then leave, so I was never really caught up in the whole christmas feel of it all. Was busy and cheerful without being crowded though.