I am also curious to have your feedback.

Indeed, the T-line gearing is its biggest weak point, it requires a gearing upgrade which isn't very easy.
But it is the smallest folded and by far the lightest even compared to Helix Ultralight because at 7.95kg, the T-line is a fully equipped commuting bike with lighting,fenders and a font bag block while Helix Ultralight is a naked bike, no lights, no means to carry anything on it, no fenders (if you commute when the road is wet or raining, fenders are mandatory to preserve your clothes).