In reply to tinytom:
Congrats for getting into climbing
My first pair of shoes had the same space at the heel, they lasted me a good year before I felt i needed a closer fit for heel hooking and technical moves. They should be fine for most climbing techniques, but sometimes indoor bouldering routes involve some tasty heel hooks and overhang work may require a more snug heel. If you find it to be a problem, get a second set of shoes later on that have less space in the heel, but the main thing is the fit round the toes and these should do you proud.