150g R-Pro Bosses are fabulous but are very demanding of clean form.
They will go really far with little effort but you have to play it right.
This is my experience too.
I have 3 R-Pro Boss's that I throw.
A 136 gram, a 145, and a 150, one seasoned, one mid beat, and one nearly new.
There is no disc more sensitive to everything formwise, than a super light, super fast driver.
First, you have to release the disc earlier than you do with a heavier weight, which means you cant get as good of a windup , then, the speed will cause the nose to go exactly where you point it, from worm burner to earth orbit.
Seasoned discs are ultra flippy too, so they really are only good for hyzer flips.
I throw accurately about 1/3 of the time with this disc. More often I griplock it, which is super easy to do with a feather in your hand, and it goes about 400', only way off the intended line.
So its no picnic as far as 150 class discs, but I always carry one anyways just for the giggle factor.
Overstable 150 class discs are easier to throw when you are starting out because they are harder to flip, so you can play with the hyzer/anhyzer angle a little and work lines better than you can with the less stable discs.
Lower stablility 150 class discs are really only good for hyzer flips when you have decent arm speed, and hyzer flips are not the easiest shot to execute properly.
Other 150 class discs I throw;
Dx Destroyer - This is a good 150 class disc, domey and stable, I can throw high flex's easily with this disc.
Star Valkyrie - This disc does not do anything better than the 161 gram Star disc I have, and is much more likely to sail offline when I turn it over, so its shelved for now. Very flippy
Dx Teerex - Very stable, less glide than the Destroyer, but if you want a good upwind 150 class disc, this one flies a nice flex line.
My current favorite is a seasoned 150 Dx Beast. This disc flies perfect hyzer flip lines for me, better than any other disc I own, at any weight, with great accuracy.
It has taken me a few years to figure out how to throw it well, but now its a money disc, best of the 150's in my opinion.
