To parody Angelica from Rugrats: If you have to ask, don't.
Resist the FOMO. Even 27.0 GR will have some bugs that just ruin some people's day. It is crunch culture at Apple every year to finish this by the time the new phone launches, but it won't be until 27.1 or 27.2 that I would recommend it for 95-ish% of users.
That said, I don't practice what I preach. But I also have a Pixel 10 Pro as my primary phone and this iPhone 17PM is just for beta testing and nothing on it is important or will be missed if something goes awry.