Customer reviews from Garmin
Garmin - Descent Mk3i GPS Dive Smartwatch 51 mm Fiber-reinforced polymer - Carbon Gray DLC Titanium with Black Silicone Band - (2023)
Average customer rating
4.6
(153 Reviews)
Rating breakdown 153 reviews
5 Stars
120
4 Stars
18
3 Stars
6
2 Stars
5
1 Star
4
Customer Reviews for Garmin - Descent Mk3i GPS Dive Smartwatch 51 mm Fiber-reinforced polymer - Carbon Gray DLC Titanium with Black Silicone Band - (2023)
Customer Rating
5
Excellent dive watch
on August 19, 2026
Posted by: NikkiC
After using my Fenix 8 on a dive, I started looking at the MK3i as a possible replacement for our G2’s. The air integration is amazing and being able to track each other’s air consumption is a plus (or a minus if you are an air hog). It’s easy to read and has everything we need for diving and other sports activities.
Written by a customer while visiting Garmin
Customer Rating
4
Extremely Powerful
on August 12, 2026
Posted by: Desend160
It tracks a tremendous amount of data and is an extremely powerful tool. The only reason it does not get 5 stars is how difficult it is to MASTER. It will take time and I am excited to get to that point t but it is not as user friendly as many other wearables even other Garmin products.
Written by a customer while visiting Garmin
Customer Rating
5
on July 31, 2026
Posted by: Colton Gage
Couldn’t be more happy with this watch super great buy!
Written by a customer while visiting Garmin
Customer Rating
5
Best Diving Watch!
on July 16, 2026
Posted by: SCUBA Descent
Amazing dive watch...visibility, colors, use...perfect!
Written by a customer while visiting Garmin
Customer Rating
5
MK3i Dive Watch Initial Review
on July 10, 2026
Posted by: ScubaSteve
I bought this about a month ago in preparation for a dive trip. The functionality is impressive, covering many different activities. The online videos are helpful in initial set up and functionality regarding scuba diving. It’ll take me a while to work my way around all the functionality and all of the menus, but it’s well worth it. This is a very impressive dive watch. I completed my first dive with the watch yesterday and it matched the pressure and depth of my other Dive computer exactly. In addition, it provides a dive profile and water temp profile after each dive. Nothing but compliments for this new watch.
Written by a customer while visiting Garmin
Customer Rating
3
Loaded with functions.
on June 19, 2026
Posted by: BKGR7M
Loaded with functions, but slower than FENIX. Starting up after initial power up or after sync with Garmin Connect seems to take 2-3x longer. Maybe time to update the product with a faster processor.
Written by a customer while visiting Garmin
Customer Rating
5
Built Like a Tank, Packed Like a Pro
on June 17, 2026
Posted by: Scuba Instructor Mike
The Garmin Descent Mk3i is easily the best dive computer I’ve ever used. It strikes an impressive balance between advanced functionality and real-world durability, making it a standout both underwater and on land.
One of the highlights is the compass—it’s extraordinarily precise and reliable, making navigation feel effortless even in challenging conditions. While the menu system is undeniably complex at first, it becomes manageable with a bit of use and ultimately offers a level of depth and customization that serious divers will appreciate.
What really sets the Mk3i apart is its rugged build. This watch is clearly designed for demanding environments. Whether you’re getting in and out of your BCD or bumping against gear and ladders, it handles impacts without issue, giving you confidence dive after dive.
Beyond diving, the daily metrics are excellent, making it a true all-in-one smartwatch. And the dive log and companion app are simply outstanding—arguably the best dive application available today, with clean organization and powerful insights into your dives.
Overall, the Mk3i is a premium, feature-rich dive computer that delivers on performance, durability, and usability.
Written by a customer while visiting Garmin
Customer Rating
5
Great dive watch and more
on June 10, 2026
Posted by: Old Rob
Fantastic watch. I bought specifically for diving and it’s fantastic. We are fairly active and I also enjoy using it for swimming laps, running, biking, and weight training. I also have the Fenix 6 which was before Garmin added the touchscreen. Love my Fenix but really like the updates including how long the battery lasts on the Descent MK3i. The flashlight is also pretty awesome and I cannot wait to use it to get to and from the tree stand this hunting season especially in green light.
Written by a customer while visiting Garmin