The vinyl bubbles you are talking about are called the bag seals. They hold up pretty good but the velcro for some of the flaps may not take much abuse.
If you peel them up carefully they will last a lot longer.
As far as leaks goes, most TMs hold up well. You still have the problem with old chaulk. Removing and reapplying chaulk can be quite a hassle. Leaks around some of the vents may take time to locate and seal.
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