I like the potential for composting the used bags, if your area has the facility to do so.The rolls come in 2 sizes, that you seal the ends to the length you desire, for what your need at hand may be, so flexibility in usage, that is a necessity to accommodate your choice of object to seal into pouch.I very much like the markings on both sides of the long sides of the pouches, it helped me align the end of the bag with my sealing machine's heat strip, this really helped my seal the chili up project go smoothly and quickly, from cutting the desired length to form the pouch, to the final seal, I enjoyed working with these bags immensely. The printed lines were a huge help in cutting the length of sealing pouch pretty straight across the top, instead of the usual less than stellar results It's get without the visual clue.I tasked the bags with sealing up a vast batch of turkey chili; 5 lbs turkey, #10 cans of crushed tomatoes & red kidney beans.Please check out my pictures, they are happily in my big freezer and I'm so glad to have these pouches, that you custom fit to your specific need.I checked up on them in the freezer, they are intact, seams are tight and good, and can't wait to enjoy this batch over our long, Upstate NY winter!