I've recently switched back to a 1HBH from a 2HBH reason being I always felt frustrated not generating enough spin and angles on my 2HBH. The stability was also questionable as well as reaching short angles to the ad side. I always cheated on the 2HBH trying to hit it open stance being lazy to step in and it started to cause some left knee issues on unstable clay due to the twisting motion of the stroke. Most of my opponents are 4.5/5.0 level as well as the tournaments that I play. After a few months, my results with the 1HBH have been the same or better than when I was hitting a 2HBH. The reason being I look more for inside-out/inside-in opportunities now and utilize the slice much better.
The big 'advertised' negatives are: high balls, power, and return of serve which in my opinion have easy fixes.... high balls you take on the rise or step back as you still don't get crazy power with 2HBH on head height balls.... power I get more power with my 1HBH... and return of serve, I return with two hands... no rule against that
Now the +/- of the shot itself to me are:
+ spin: way more topspin and easy depth
+ angles: better angles when passing and on shorter balls
+ power: when you are in time and hit full in sweet spot it’s magical
+ feeling at impact: feels amazing when hitting clean just like another poster said
+ greater reach: I reach wider balls
+ variety: i’m forced to play more variety and attacking tennis
+ more inside-out/inside-in opportunities: looking to run around it
+ easy to disguise slice/drop
+ same distance to contact as FH
+ I always found the weird wrist drop on the 2HBH uncomfortable for me
+ opposite motion for rhomboid/shoulder/obliques/scapula: feels more balanced this way
+ closed stance avoiding weak 2HBH open stance & left knee twisting which was a problem in my 2HBH
+ I return with two hands on the frame
+ looks amazing
- high balls: slice or go back or on the rise
- harder to do open stance but never felt the need to do it honestly
- fails under pressure with very low balls or when opponent at net
It's still a work in progress and at the end of the day I didn't 'forget' my 2HBH, I'm just putting it on the shelf for a while. As long as I keep winning against players I used to beat with the 2HBH, I will stick with it as it just feels so much better at impact.
PS. 30-40% of the Top 10 Open level adult rec tennis tourney guys in my area use a 1HBH.