Possibly. From the renter's perspective there is little risk. Seems that the thread started off looking at it from the owner's point of view. They may very well have an excellent rep. I'd love to hear from some boat owners who use their booking services.
All a matter of perspective. It may be just fine for an owner looking to pick up a few hundred dollars here and there. I highly doubt it could do much more.
Any Owners out there who care to share?