Been signed up at Single Bet Calculator since around February, mostly late at night on the sofa, so this is just my two pence. Found it off another forum thread, nobody paid me.
The lobby is frankly enormous — a bit over 3,500 games last time I counted. NetEnt is everywhere, so Sweet Bonanza and the usual suspects all show up. I tend to live on Yggdrasil stuff out of pure habit. Small annoyance — the search function on Single Bet Calculator is a bit rubbish, filters half work.
Live tables are almost entirely Evolution, so you know what you're getting. Real croupiers, decent stream quality, and Crazy Time pulls a big crowd most evenings. Should mention the UK side is well covered in the evenings. If you're weighing up the promos it's worth a look over on single calculator bet since the offers shift about.
The sign-up deal from Single Bet Calculator came as 100% up to ?200 plus 100 free spins. Rollover is 40x which is standard-ish. They also ran a ?5 no deposit token on verification. Min deposit is ?10, registration was quick, verification took about 24 hours.
Withdrawals have been the best part. Card payments take 2-3 days, Skrill and Neteller hit in a few hours, and Bitcoin clears fastest. Pulled ?180 out on Tuesday with no drama. Support at Single Bet Calculator took ten minutes once, three another time — human, not a bot script. They're UKGC licensed, which matters more than the bonus size. App-wise there's nothing, which is mildly annoying but the site works fine.