Looking for a borescope recommendation

I've watched a couple of EAA webinars about engine maintenance and seen the Oasis Scientific VA-400 recommended in both.  The photos shown in the webinars certainly looked nice; valve condition was clearly visible.  I haven't used one myself so this isn't a testimonial, but I do intend to buy one when the need arises.

https://www.oasisscientific.com/products/vividia-ablescope-va-400-v5-usb-rigid-long-articulating-borescope-with-180-degree-one-way-articulation

I have the VA-400 and like it a lot. Just make sure you get the latest model that has a locking articulation control so you don't need to keep your finger on the button continually.