I bought the Performance bag on eBay a number of years ago. Most of the time I left the suits in the office, but needed to carry them occasionally.

The garment bag worked fine; it held suit, shirt, shoes, etc. I wouldn't trust it in heavy rain, but in dry weather it worked fine.

In my case, the rack on my (1960) Gazelle was a little wider than the new racks the bag was designed for so the sides were a little looser than intended (used bungee cords to fix). No problems with 5-10 mile commute.