Such an easily overlooked item can be a big big help. I have been assembling notebooks and use these to keep them closed and in order. They also help if you want to secure boxes without necessarily using tape. They are heavy and not easily stretched to the breaking point. I would recommend them.
We are a construction company and I needed large rubber bands that kept job papers together from the accounting department project manager and owner after the job had closed. These large rubber bands have allowed us to bind these papers together and leave divider tabs in tact. They also do not make your papers bow over because they are too tight. We can now put several jobs in one box but yet keep them separated from each other. I put one rubber band on width wise and one horizontal to make sure papers do not fall out.