Booked a viewing with dove and was told 5 minutes ...

Booked a viewing with dove and was told 5 minutes before my viewing (after driving an hour) that the property was taken, I did not receive any apology of any kind until I emailed them later that day. I was then told that houses are let on a 'first come first serve' basis without being told this when I booked the viewing. It seems other, more customer focused letting agents in the area hold the houses for 3 days after viewing before allowing others to view and sign for them. I would avoid and opt for a more customer orientated letting agent such as Merali if I were you.