If something isn't broken, don't fix it
If you attend a wedding ceremony and see a celebrant who impresses you, don't be averse to choosing them to perform your own ceremony. There's absolutely no reason why you can't also hire their services, just because a friend or relative has already used them. If you liked what you saw and sense they would also be a good fit for your own Special Day, then stream right ahead and get in touch with them to get things organised. If your gut instinct tells you it feels right, then run with it and you'll never be disappointed.