I've used this once so far on a business trip to Germany. I packed two dress pants and about half a dozen shirts into it - it looked like it could hold more without trouble. The folding guide worked great; all my shirts and pants were uniformly folded and fit nicely into the Pack-It. Upon arrival, I was happy to see that all my items were in a condition that they could be worn without touch up ironing - which was a bonus because the hotel we use does not provide an iron in the room like most American hotels. I think that the uniform folding helps keep clothing in good shape because otherwise there always seems to be an inch or two that pokes out from a stack of shirts and then gets extra wrinkled when you squash more items into the suitcase. I also think it helped me pack a bit more compactly because I was able to tightly bundle the items when I closed the flaps of the Pack-It; then I could just drop it into the suitcase and not worry about keeping that bunch of clothing snugly in place as I added other items. This will be staple for my future trips.