I use iHomefinder.com on my personal Realtor website to include my personal listings as well as an MLS search. I am happy with their service. Their new member training was great and it helped me setup their service on my site.
I was with another web host for three years and the last few months were awful. I switched to GoDaddy and the experience has been great. Their tech support is 24/7, which my old host was not, and they have been able to address my questions and concerns.
I used Websitebox for three years and was happy but then my MLS IDX feed stopped updating. I spent over a month trying to get them to fix it but they kept saying it was a developer issue. It was not resolved so I moved to another web host. What good is a Realtor website without current MLS listings and the ability to search current listings? Stay away is my suggestion!