Not that the machines aren't risky enough, but slot service is now proven to be an additional risk at Excalibur: I cashed out $80 (of what was a $100 bill) on a Tarzan machine at Excalibur about 10:30 pm on December 2. This recent visit prompts me to offer this 'beware' to slot players.
I've been to Excalibur Casino so many times and had a normal experience.