SCAM ALERT. Charter Bus Express did not honor Groupon (they finally called back), doesn't answer the phone (call different times of the days for 12 days until they called back), no options to book on their website with a Groupon voucher. I ended up trying to repay as a new booking on their website. Just to cancelled after they charged my credit card the $25.00 (regular fare) fare and than an additional $3,500 that was never authorized. Luckily my credit card caught it on time.