I am not purchased that for now, but I can say it depends on what emulator core they used. Though for most of them it should works fine.
I have terrible memories with these emulation handhelds... I remember I bought two similar product 10 years ago; It can play SNES games, but no echo for sound, no SA-1 enabled games, and missing colors (it actually replaces missing color to black for some reason)... Though after 10 years, these products should improved a lot.
From the video they provided, it's not pixel-perfect. Sure, you can't except that due to the nature of retro game screen resolutions, but the resolution of this one is quite low (320x240), and that make these retro game looks not very comfortable.
Emulating retro games on a modern Android phone is much better; It has more processing power and decent screen resolutions, which runs much faster and the graphic looks very sharp. Also, there are more choices; You can even running Sega Saturn, Gamecube and Wii games.
My option is just use an Android phone and buy a Xbox joystick; Maybe you want to add an stand like this, so you can play games more convenient on the go.
Yeah, it only sold for $40, and it's seems ideal for children's gift; though I would rather use that for a good meal.
Now here's the problem: It starts pretty late at night (at 8 PM in specific), and I don't doubt that I'll arrive home late AF, but even worse is the fact that it's very far away from my home, so if I lose the money I have in any way, it's very likely I won't be able to come back home at all
I think it depends on the public security of your location. But if it's something you really love, I think it would be great to go there; plus, meeting the real guy of your favourite artist would be a great experience.
Recently I noticed Tuyu released their first album やっぱり雨は降るんだね, which is a doujin one. I think these song are pretty awesome, but it doesn't avaliable on any streaming platforms as far as I know, and there are no way to perchase a digital copy of the album. It seems the only way to access the full album is purchasing the physical CD through their store, and import to my country via an transfer company. That means the shipping fees would be expensive.
Now I am considering if it still worth purchasing the album. The same thing happens on a lot of doujin albums which don't have record company and don't have digital releases.