I play with a Mezz PB2 for almost 3 years. I'm 1.77m tall and I have no problem using the cue.
Mezz PB feels more compact. Even if the weight is 18 oz, the cue feels heavier, than a 19 oz standard length cue.
Cue provides great power so you don't need to put much effort to obtain a good break.
It can be used for long jump shots, but it's not designed for that, so if you are looking for a jump/break cue it's not the best choice.
The short butt is a good thing when you are playing in a place with not enough room around tables. It helps me couple times.
I tried almost every other Mezz break cue and, IMO it's no big difference between them, it's only mater of choice and practice time.
I got my Mezz PB2 s/h for something like 250$, so it worth that money, but I will not recommend it for 450$, if you want to buy a new one.
P.S. It's a good cue, but it's not a magic tool, any break cue will perform good if you put couple practice days in your break.