I’m based in the UK and have been using betmaster on and off for a few months now. Overall, it’s been pretty straightforward to use. Sign-up was quick and I didn’t run into any issues getting set up, which isn’t always the case with some sites. One thing I did like is the range of payment options, deposits/withdrawals felt pretty standard and I didn’t have to jump through too many hoops. In terms of what’s on the site, there’s a decent mix. I mostly use the sports book but tried a few casino games as well, and it seems like they update things fairly regularly. Nothing groundbreaking, but enough variety to not feel stale.
They also run quite a few promos. I used a couple early on, they're decent enough if you’re already planning to play anyway. Haven’t pushed it super hard yet (especially with larger withdrawals), so can’t fully speak to how it holds up long term, that’s usually the real test with any of these.
If you have any questions on something I didn't cover, lmk.