Yes. Some hosts of course swear by it, while others prefer to have potential guests send a reguest first.
I used IB for a few days, and had a couple of bookings which turned out to be fine. However, I switched back to 'Request' after reading a number of threads on the forum about the risks. I'm a woman living on my own, and I want to know exactly who will be sharing my space.
When someone sends a request, there's an opportunity for a relaxed and informative dialogue
prior to the booking being made. Both parties can then determine whether in fact the host-guest-accommodation 'match' would be suitable.