Never had a problem with
Canbet.
They were outstanding price wise when they first appeared and then went badly off the boil. Been pretty good this season especially on AH prices.
As for limits, not sure but check their T&C's...or phone their customer service. I would link direct to them but can't access bookies sites at work.
Have never had problems with them, either paying in or withdrawing but I normally use Neteller for all my dealings with them. Pretty smooth IMO.
They are Australia based so will be very tightly regulated. They will no doubt ask you to confirm your ID ie proof of name, proof of address, but thats standard for many bookies nowadays.