Patti:

I have commuted on my Giant Halfway year round for 2 and a half years. It has been a great bike. The only rust I have noticed is on a few nuts. The frame and handlebars do not rust. The Halfway folds flatter than the Dahons, but is not a compact fold. For my needs the fold works great, I commute with it on a commuter rail train. If you are happy and comfortable with Giant dealer then I would get the Halfway. The Dahon Mariner is a good bike also, though I think the Halfway is a little better. The Halfway has better tires(higher pressure). Overall the quality of the Halfway is very good.

David