When biscuit was in his first pen, it was all very odd to him, he'd come from a really small high pen in a garden centre to a 5x2.5x2 ft pen, it took him a couple of days to accustomise himself to our home, but he soon got used to it.
Now i've changed everything again (as you are aware, [Project Play Pen]) it again took him the best part of a day to aclimatise to it.
I'll never look back now though, he's so much happier.
It's just taken me about 10 minutes to type this reply as he keeps jumping up on the sofa with me whilst the OH is on the phone to my brother and he keeps typing for me!
Just keep an eye on him every now and again, but trust me, im sure he'll be fine, sounds like you're like me and most others here, worry about our buns so much as we just want whats best for them!
Hope this helps re-assure you, just be happy in the knowledge that he will like it.
Side note about your drinking bottle; Biscuit had never had anything but a drinking bottle in the garden centre, but when i got him home, he just couldn't use it. I bought the same one they had at the garden centre and then another one and another one and he just couldnt cope. I gave him a water bowl and he was all confused for a while, but he soon got the hang of it. He also got his little paws wet:lol:
Sounds like you really want your bun to have the best, so good on you. Do you have any pictures of your setup? I'm always keen to see other peoples bunny areas!
Gray