I dont think you can really judge based on a few anecdotes. Firstly, its very unlikely more than a few people on the forum will have used them, there are about 15,000 brokers in the UK and BTL purchases accounts for less than 1% of the mortgage balances going through. Here's how i'd filter: How are they authorised by the FCA? Look at the bottom of their website, there has to be a statement about the FCA, and an FCA number. You can double check this here. You are either directly auth