I love the rolls because I can custom cut for any size! Roasts never seem to fit in the pre-made bags without wasted space or worse yet, trying one size, finding out that it's just a tad bit too small then having to try another and potentially washing one or two instead of one and done! I have even used the roll to make bags for my clothes on rafting trips - the seal ensures that I have dry clothes to put on no matter what the conditions!