I tried CHBO and also found that it wasn't worth the money. I saw the not very positive experiences in this thread, but I figured it would be worth it if we at least got one booking through it. But after two months there hasn't been a single inquiry. CHBO reps say it's a slow time of year and says we should post more photos of the outside, etc. But during that same period of time we easily booked 3 stays totally 6 months of medium-term corporate renters (a travelling nurse and two business travelers) using AirBnb for the same property as soon as we opened up the availability on AirBnb.
The biggest red flag is that CHBO offers no free trial period, they charge a large up-front full-year fee, and it's completely NON-refundable. If they knew their service had better value, they would offer a trial period, a monthly subscription option, and a money back guarantee. There's clearly a reason why they're one of the few services that does none of those things. I knew that was a red flag when I found that out, but I ignored my guy feeling and tried it anyway. But it was just a waste of money, but a lesson learned.