I would definitely recommend the BCB for the adapters since they are OEM, but I do NOT recommend using only 1 set to keep swapping by unscrewing it every time you want to change straps.
The screws are not only very small, but the thread is very delicate. It comes with some threadlock on it, and Apple recommends that the screws be discarded after each use. I think you can get away with 1 swap, but doing so repeatedly may strip the screws threading. I've already done a swap, and it is not something I would want to do every week.
I ended up ordering both the adapter with the bars that you use the itsy bitsy screws on for a more permanent install on a band I really think I'll wear a lot, and then also bought the adapter with the spring tension bar for any bands that I may occasionally want to use and swap out more frequently. Of considerable importance is getting an adapter that doesn't damage your watch or come loose so your band detaches while wearing and sending your watch to the floor.