To Broker or not to broker?

I've had three mortgage advisers referred to me and I'm fed up and on the verge of either going for a Googled one or just going straight to my bank.
Two have taken my details and haven't gotten back to me and 1 took my details and came back with recommending a Santander mortgage because "Santander gives cash back and with the cash back I'll pay him." It felt like this was the main reason he was recommending this mortgage. Am I missing something?