I am a bit of a watch fanatic and have quite a few, including some dive watches. We all love them, even if we don't dive, because they are the ultimate "tool" watch: rugged, durable, can take abuse, have that great timing bezel feature, heavy bright lume (not the ridiculous little dots non-dive watches have which are useless), and of course the sealed crown and waterproofness.There are reviews you can research on the watch addict websites and forums, particularly WatchUSeek, that have a large number of photos and extensive discussion and review of this watch, its construction and features, and its Pantor siblings. For those unaware, Pantor also makes the Seahorse, sea turtle, sea lion and one other I can't recall with depth ratings at 300 meters / 500 / and 1000. As if we need that.All my divers have steel or metallic bands and this was the first time I'd worn a silicone/rubber strap. It's actually great. It's a tad cumbersome to get it on and off (not just a flick as in the typical metal band) but man, is it comfortable! The lume, if you charge it properly, lasts all night. I barely ever take the watch off. The movement is a good one, it's both manual windable if needed and hackable if you want to synchronize. For those not familiar with hacking, you pull the crown (winder) out to the proper position when the second hand is at "12" which stops it. Then you await the time signal or just watch the display at time.gov for the US atomic clock. Push in the winder precisely as the atomic clock minute begins anew and you're synchronized. I let mine run a full week and checked the accuracy; it was a gain/loss of about 17 seconds a day. Very very good performance for an automatic in this price range. Personally I don't take mine apart to do fine adjustments in an attempt to get better accuracy; if you know the typical gain/loss, you can easily re-set once a week or so. Yes, we all know a crap quartz watch has better accuracy but which do you want: a piece of battery operated junk, or a minitaure precision factory buzzing away on your wrist?!In conclusion, I've owned many dive watches including the ever-present Seiko SKX and this one blows the doors off of that competitor for value. Much better movement for sure. Additionally, if you think the size is too large, there's a strange effect here. The Pantor is built into a "turtle" case. That is, the watch itself is mounted in and on a case that is larger than the watch. Kind of like a salad plate sitting on a dinner plate. The result is the watch "wears" smaller. It looks differently and feels differently than if the case and watch were the same size. I'd never had a turtle case before and it really works well.Hope this review is helpful to some of you. This watch is a great value, a high-quality timepiece with excellent features that compete with some that are 2,3 and ever 10 times the price. A good value!Months later update (Good and Bad);When unscrewing the crown to re-set the time (about once weekly), I noticed the rubber gasket was getting visible. Then it tore / or came apart and ejected itself out of the stem area. Oh no! No rubber gasket. No waterproofness!!I conducted a back and forth email correspondence with Pantor (in China), which as highly frustrating. It took endless time to get responses, and they were non-sensical. Finally I got some information out of them which basically said send it back for repairs. That would take forever; forget it. I'd rather buy a new one. So I asked instead to tell me what gasket I needed. They answered cryptically that I needed a set of 13 (!!!) gaskets. Fine, sell them to me. They wanted like $100 for the gaskets plus shipping. Preposterous. I was incensed.Instead I took it to my local watchmaker/repair place and said the gasket deformed and popped out. Can you replace the stem gasket and do a pressure test for water resistance? Sure! Inexpensive repair and now I'm back loving the Nautilus.Strange sage. My original comments stand. This is a great value. But the customer service sure ain't up the Nordstroms, or Seiko, or Rolex standards.