excellent quality......very comfortable.....quick attachment works great....order arrived very quickly

Just stsrted to use it as a replacement and it is working fine.

The mouthpiece on this thing must've been made for a young hippopotamus! Way too big for comfort. I'm sending it back without having used it. To be fair, it seems like all the manufacturers have the same problem.

high quality, fits IST mask well, mouthpiece needs to be about a half inch shorter

It's been a while since using a snorkel, or swimming for that matter, so I'm glad I chose this one.  The only problem was a little adjustment on the mouth peice (the bite needed to be trimmed for personal comfort), but I love the semi-dry feature.  I haven't figured out how it works, but who cares as long as it does the job.  A very short exhale once back on the surface clears out all of the water.  It's hard to use one hand for nose pinch while decending so I have to use a finger from both hands to equlize ear pressure (hard to reach around snorkel valve with one hand to access nose in mask), but so far no problem.  With bad C4-5 vertabre there is no need to turn head to breathe while swimming.  I think it's a good product.

Used for light beach combing.
For the quality (which is great) they are well priced.
Was not expecting adjustable but the bottom allowed for the mouth peace to be positioned to angel under the mask which was great. Maybe they all do now a days but I not seen it yet. Would be a great design to allow the top to swing around a bit so the top points away from the water (Upwards?) I didn't want to force it and find out it was not meant to twist there. While looking straight down the top of the snorkel can get into the water and there yeah go having to re-clear. But with the small purge valve at the bottom it is a easy clear snorkel. Simply added small PVC elbow at the top and was good to go.
Yes I would buy it again.