Lyen or Kelly? Fried one? Love one?

[Morgen 3Eman]

Hi Folks,

I would appreciate some user experience knowledge sharing.  I am going to use it with a MP3 , 48V LiFePo4 GM battery.  I only want to buy one more controller, so reliability is more important than price.  (But price is still important)

TTFN,
Dennis