cat

was not aware that that existed, god that thing looks cool

A friend of mine has one

• It's very good, the screen emulation is amazing— the screen is so high-dpi that it can actually accurately fake the LCD matrices of many vintage handheld systems.
• It tries to do so many things it's inconsistent at many of them. Which features are available is highly inconsistent depending on core. For example, that screen emulation I mentioned doesn't work when you're plugged into a TV, even an HDTV. Analog sells a custom DAC (connect to legacy CRT TV) just for their products, but it doesn't support the Pocket yet. However the Pocket has been steadily (slowly but unceasingly) improving since release and I suspect eventually it will support Everything. You get the sense of a team that is dedicated but small.
• Definitely get the dock. The primary use of my friend's Pocket has been hooking up 4 playstation gamepads via bluetooth and playing 4P SNES games that were never released in America
• Analog makes a huge deal that this is not a piracy device, that they expect you to stick in Game Boy cartridges. But apparently it isn't very good at this and has a problem where playing with a cartridge it can reset if you bump it funny. In general they seem to have a problem where they had a particular Look for the Pocket and did not care. This leads to both the cart-bumping problem (they were so obsessed with the idea that when you put in your game boy cart you can see the label that they didn't include enough plastic to hold it in place) and the case is slightly too small for many people's hands. These problems obviously don't come up if you use the dock. There are several third-party 3D printed accessories you might want to consider, such as a plug for the useless game boy slot and little wings that mold to your hands (I'm aware of 2 different aftermarket holders for different hand sizes). You'll want to spend a lot of time installing "aftermarket" cores, this will be a Project, maybe that is part of the fun.
• Don't expect it to arrive anytime soon. I ordered one over a month ago and have not got a single update yet.