I found Which? Mortgage Advisers to be quick to respond and clear in their communication with both personal phone calls and email, following calls up when they could not obtain me immediately or responding when I left a message for them. Not sure they fully explored all our options when we initially started inquiring, but they gave us specific recommendations and highlighted competition between different providers and what, at the current moment in time, was cheapest over a 2 year cycle of low rate and fixed rate mortgages. They kept us informed of changes in the market and when we had specific questions about details of a mortgage they provided answers, reassuring us. When we made our decision to pursue a particular mortgage they moved extremely quickly and secured the offer for us.