So far so good with the G-5. This is my first scooter, and it is a much nicer experience then I thought it would be.
Got a few hundreds kays up now and all in all I'm pretty happy. Power delivery strangely enough reminds me of my old Ducati 900S2, there is very little bottom end, then a large, linear mid-range with no top end to speak of, just like an old bevel drive Ducati. Everything happens in the mid-range.
Ist gear ~55 km/h, 2nd gear ~65 km/h, 3rd gear ~80 km/h according to the speedo. The 'S' button will temporarily boost speed up in all gears by about 15 km/h or so for about 30 seconds before coming back down to the speed of the gear you are currently in.
I rode to Hua Hin yesterday and back, a round journey of about 75 kays or so and there was about 35% left on one battery and <10% on the other. The batteries drew down equally until about 60% left on both, then the load increased on one battery and reduced on the other. This could cause problems in the future if one battery is constantly being drained while the other battery has less load placed on it. Maybe the engine/battery management system needs to be looked at.
Haven't got a good feeling for the handling yet, but this is a scooter and I'm not going to be doing my Mick Doohan impersonation on Thai roads. Two hydraulic disc brakes front and rear pull it up well, impressed with the braking.
Battery management issues aside, I'm very happy so far with the G-5