Only giving the Relay 4 stars because it's difficult to find the best runs of it. I bag these near max weight in the pre 2020 neutron and the mvp open 2020 plasma run. 

The pre 2020 neutron have all been true to flight numbers for me. Very glidey. Understable but not in any hurry to burn out or be an accidental roller unless you simply overpower it. Hit just right these things will go almost as far as some 9 speed fairways. Can also take a forehand (which I've rarely ever found an understable fairway for, likely do mostly to my mediocre forehand form, admittedly) and is very thin/flat so feels great in hand for a forehand. 

The mvp open plasma start out like an explorer, basically, but season into a really nice -1/1 type of flight. Really great for a hyzer flip to dead straight forehand. These also force flex or turnover beautifully without ever thinking of burning or rolling unless you simply overpowered it. 

The newer neutron runs have felt like a finicky -1/1 type of fight. The newer cosmic neutron are close-ish to the plasma ones, but I just prefer the feel and overall utility of the plasma. I have stockpiled old neutron and plasma ones as I don't much care for the newer runs. 

This disc is very underrated. I have it in my bag and need to throw it more often. It is great on the backhand but also a great forehand option. if you are playing in the woods you should have a Relay