I have one, and the one I got was Dr. Browns. Made for those taller, multipart ones just to find that my son preferred the more simple bottles that were made with a closer to breast shaped nipple.
I used my bottle sanitizer for over a year, and I'm planning on using it again. There are inexpensive ones that you can put in the microwave and also there are bags for travel.
I never used one with my oldest and don’t plan on getting one this time around either.
I would wait. My first baby ended up preferring a bottle too tall for the steam sanitizer I bought and it never got used 😅 the dishwasher sanitizes so stick with that initially