I find them no better or no worse than other types and I’ve owned most types, pures and crosses.
Like getting any type, you must do your homework with the breeding, parents , etc.
I obviously wouldn’t get one just for, say, ferreting or lamping rabbits. They will do that but there’s better types for the job.
I mainly run hares and roe these days and the odd fox, and the deer crosses will do that as well as anything else.
Its just a personal choice, I like them as they are easy to live with, and do what I want of them.
Ive a soft spot for whippets, beddy’s, Salukis and