They are really intense. I think it's too much for anything but glutes and those occasional people who can't get deep enough pressure. I have a Lyric, which is less-intense, but I actually found an awesome cousin to the massage gun family by HoMedics (They have been doing the home shiatsu massagers, chair massagers and foot spas forever) It's super mild, has the same massage gun shape, but it has vibration and works fantastic on relieving superficial trapezius and neck knots. It can temporarily loosen knots in seconds so you can work on the area.

When it comes to RA, be cautious. It can help ease pain and stiff muscles, but you don't want to put any direct pressure on the joint. Massaging a joint during an RA flare up is contraindicated.

There are very gentle massage guns out there, Homedics makes one that only uses gentle vibration, but has a handle that makes it easy to use like a massage gun. As always, talking to a doctor first is a good idea before trying anything new.

This. It's on sale at the moment.