Hello
I have 3 Harmonie, two with 175 CDI and love to fly with about 15 mn to 20 mn.
No problem of reliabilty.
I also have Harmonie with hacker Q80, I also love it. But just my opinion, flight is too short about 7 mn.
There are advantages and disadvantages with YS and electric motor.
Friends of mine have difficulties with the two;
deadstick with Yam and burn of plane, loss of magnets, breakage fuselage and loss of motor ...
But The main thing is to have fun.
claude