As a veterinarian as long as your pet is on a flea/tick prevention that is ON BRAND (not a generic etc) I am happy!
However, as a pet owner, I simply prefer the pills for my pets so my dogs are on Simparica which is a monthly flavored tablet. My cats are on revolution as there are not any tablets for cats that I’m familiar with and I don’t like flea collars, although the seresto collar which is for dogs or cats is popular with my clients!