Anyone use or heard of branchadvisor.com

[KevF]

Been approached by the owners of www.branchadvisor.com to use their site to gain feedback from customers/clients....

As it is a new start up, there is a no cost option at present but wondered if anyone else uses a feedback capture system in their business and does if offer a genuine avenue for improvement or have they found customers abuse the system and just use it to be detrimental...