We have two of them (had recently bought one and used it when we got the second as a gift and didn't have the heart to admit to the duplication), the soft kind. They have served us well, but have their limitations. We've been in wet weather with them, but not extended periods of downpour; I generally put the sleeping bags in trash bags just to be sure. We have roof racks, and the soft kind sure is easy to get on and off; we've used them for camping, and it's nice when we get to a spot to be able to take it off, fold it up, and not have the carrier on top in the interim. I also like that it has some give in the packing, and that we can cinch it down tight. When using the carrier and making a stop to eat or shop or do touristy things, we're not obsessive about security, but we try to park where we can see it, or where others will be able to see it easily, just to reduce the chance of theft. Nothing irreplaceable goes in them.