The alarm seems very high quality and its siren is very loud. The remote control is sturdy (its buttons are on the side). I still don't have an opinion on the battery. The reason I give it a 4 in the rating is that on the YAMAHA XMAX '23 where I installed it, I was informed that it cannot be connected to the motorcycle's indicators, so they never flash in any function (arming, disarming, alarm operation, etc), something you don't expect for the value of this alarm. [I am waiting for confirmation from elser on this and if anything changes I will come back with an edit]

I would say that it is an excellent alarm!
I have combined it with the perimeter, which I haven't needed much...
It has a two-way control that informs you about anything that happens when the alarm is activated.
The battery in the control runs out relatively quickly and needs to be changed, maybe it could be rechargeable.
In combination with a GPS, it could be a satisfactory option for aspiring thieves, although the best protection may be not to lose sight of your motorcycle!