In paragliding you call a glider with 3-levels (A, B and Z) a "two level" as you don't count Z = brake line bridle. Against this terminology foil kites and also Flysurfer call it 3-level.
But apart from this terminology flymaax boom looks like pretty much of a copy of FS sonic race which has been first race foil kite with (A, B, Z) bridle.
To me webside more looks like: Somebody let himself build his own kite.
I would not expect a bit of his respected racing success comes to you with this kite until you can't affort to train 6 h a day for the next 5 years.
I don't see any kite engineering / development potential comunicated via this website. Could be that they just need to offer this kite to puplic to be allowed to register it in some competition as "serial" kite.
So overall I would not give anything about the kite.
But if I am wrong, would be good, as so we would have a new relvant product.