Let me start by saying this little gadget has saved me countless hours of frustration. As someone who regularly inspects car engines and HVAC systems, the Hijoy borescope has become my go-to tool for those 'impossible-to-see' areas.

The 5-inch IPS screen is an absolute game-changer. After years of squinting at tiny screens or struggling with phone-connected scopes, this bright, crisp display makes inspections feel almost luxurious. I recently used it to examine cylinder walls, and the detail was impressive - I could clearly see cross-hatching patterns that my old scope would've missed.

The articulating head deserves special praise. While it only moves in one axis (something I wish was clearer in the product description), the ability to rotate the camera 180° has been invaluable when checking valve seats. It's not quite as flexible as those $36,000 industrial models, but at this price point? Absolutely worth it.

I've put the waterproof cable through its paces - from inspecting rusty water heater tanks to checking clogged drain pipes. The IP67 rating holds up well, though I did notice the housing could be slightly slimmer for really tight HVAC registers.

The 8 adjustable LEDs are surprisingly powerful. During a recent home inspection, they provided perfect illumination inside dark wall cavities where I needed to run wiring. Battery life hasn't been an issue even during all-day projects.

Minor gripes? The plastic construction feels a bit cheap (though all scopes in this range do), and there's a learning curve to maneuvering the articulating head effectively. But considering you get SD card recording, USB-C charging, and that fantastic screen - these are small compromises.

After testing three different scopes this year, the Hijoy stands out for its combination of features and value. Whether you're a professional mechanic or a DIY enthusiast tackling home projects, this tool will quickly earn its keep in your kit.