I just bought the same adapter - waiting for it to arrive - Have an old Rokkor 50mm 1.7 that I can't wait to try. Used it on my Minolta 20 years ago in HS for photography! LOL
You're going to have a lot of fun with Minolta lenses. They have a beautiful look.
A tip - try turning Sharpness up to +1 or +2. These vintage lenses are inherently softer than contemporary lenses, and need a little help to look their best.
I am using the rokkor 50mm 1.4 with the RJ adapter and its just delicious. I'm going to buy one more adapter and some more lenses. The lowlight performance is just unbelievable for this price.