Hi - I have GIANT Expressway which I like very much and which is strong and most reliable even after multiple foldings and set ups.
I upgraded chain soon after purchase as transmission was not smooth. With new Shimano chain it is smooth as silk.
Bike weighs 12kgs about 26lbs. I think this is heavy? I personally would not take this on a commuter bus as is akward and flops about unless you use a couple of velcro straps to hold it tight closed. It is not as small when folded as you might hope.
I recently took on international flight using bag provided, I tight Velcro strapped bike, then tight strapped around outside of carry case.
I wrapped chainwheel in thick foam rubber as I felt this was one weaknes baggage handling could damage. There was no damage during handling.Also find it takes 10-mins more to cycle 20kms than on my Cannondale roadbike. Rear tyre needs to be really hard.
Any advice on folding bike use welcome.