This was bought specifically to get my bike on a train that had filled its allotted bike reservations. For the price, it does the job well, with sturdy materials. There's not a great of protection for the bike, but it's basically just a cover. My oversized mountain bike fitted in OK, although because my bars are so wide, I do need to detach the stem.
I was able to post the cover back to my home by folding it up and taping it into a bin liner.