Mile high, it's not really brand bashing, it's a poor design. When other manufacturers are using various slides and don't have this issue it begs the question why a design would be chosen to allow water intrusion. It would scare me, if I had this unit in storage and bugs like mud daubers decide to plug it, it will sit getting water in the coach every time it rains until I find out about it. It's a lot different than a clogged house gutter - which is pretty noticeable the first time it rains. Each brand has their share of silly designs so don't take offense - it's not personal. Some brand's slides fail altogether - so...