I used the majesty and the JP15 for about a year. They are both quality guitars and the price seems to be in line with the quality you get for USA instrument these days. They have a lot of features and a lot of electronics, all of which can go wrong - quickly. The concept is very cool - if that is what you need. I had 9 in my line up - 3 JP15's and 6 Majesty's ( 2 monarchy models, a koa, 3 earlier models).
I think the guitar would be more usable if it didn't have the boost/piezo/active section or if you had the option to still use the analog guitar without some battery drain. There are so many times I just wanted to use the guitar as a "guitar" and not worry about the extra features and it would die mid gig, song, etc. I didn't find their approach to single coil sounds all that useful and so you are kind of in a two pickup - LP/PRS/Ibanez land and somewhere in between for sounds which was not enough a draw for me to continue with them.
The other thing I would say if you are dead set on a Jp15 or Majesty model, I would go JP15. I didn't like the feel of the Majesty. It is a killer instrument, it just didn't give me the ability to have some the of the qualities I like in a super strat style guitar. To me the JP 15 is slightly more well-rounded. I think they could re-imagine the majesty with a roasted neck and it would be a more useful instrument. But it is designed for JP himself so that is what you get....it works flawlessly for his genre and "OK" for other styles which is also not enough for me.
The Sabre is a cool alternative for sure. Not crazy about the trem - but it is ok.
It is a preference thing....EBMM is a killer company and they are top in CS and design. The only downside with them is they do not have a more "custom" approach to design.
If they did, this might be a guitar I would still be playing...