I’ve got a decent amount of experience with Prospex models, and while I haven’t personally taken the Great Blue Hole edition for a serious dive yet, the chatter is pretty unanimous: it holds up well under real-world conditions. Its water resistance and robust build don’t deviate much from Seiko’s all-round Prospex reliability, though the distinctive dial and color scheme make it a standout both aesthetically and as a collector’s gem. Do keep in mind that its style leans heavily into design flair—if you decide to put it through rigorous dives, just monitor the seals like with any dive watch. Overall, it’s a compelling mix of form and function, especially if you’re drawn to that deep blue vibe.