I bought the Eclipse specifically to take a bike on the Amtrak Surfliner without needing a reservation. I stow it as luggage, and when the bike isn't folded and the seat is way down I have somewhere to sit while waiting for my station to arrive.
The overall design is very good, folding is easy and quick, and while obviously not a lightweight bike, it is very well thought out. Most riders I think shouldn't need to change a thing.
I've been riding for 60 years (70m), touring, racing, dirt, commuting, etc., and normally ride an XL frame, 63cm. The Eclipse fits me just fine, thanks to the long seat post and clever bar stem -- the ride is nimble and comfortable. Brakes are very good (even though I dislike disc brakes), wheels and tires are good, seat is good, grips are good, all keepers.
I'm old enough to need every possible advantage to keep riding like a was twenty (ha), so here's what I changed: The fenders are nice but it doesn't rain much in S. California so I removed them. The folding pedals work very well but I swapped them for SPDs so my feet will stay stuck to the bike. The handlebar is wide - I cut it from 24 inches to 20. I don't like indexed shifting so I added extensions mid-bar and put friction shifters out on the ends - an improvement that saves my thumbs and gives another hand position. The 50 tooth outer chainring is rather ambitious, so I swapped it for a 44, which is still plenty fast for downhills. A rack added on the back carries my touring panniers for groceries and I bought Tern's front truss and HQ bag for trips to the library.
My next plan is to climb some big hills on the Eclipse, go up some dirt roads, maybe an overnight, and of course, ride the train. Thanks!

nice feel, smooth shifting and goes fast when i want to. folds quickly and fits into the back of the car...no problems.

The bike came with fenders which is not in the pictures or the description. When asked about it the response was "Well you can just take them off." Really?