This appears to be identical to the "q5" ips kits on other sites. I would highly recommend Makho's video on YouTube under the name "Game Boy Color OSD Q5 IPS LCD Kit".
There is one thing that makes this kit better than anything else right now: a proper screen. With previous ips kits, you would need to trim down to the dpad housing(!) to make the screen fit in the shell; this is due to the fact that other kits used a very similar (maybe identical) panel to the GBA ips kit. Since the screen extends as far down as it did, translucent cases did not work well, and simply didn't seem to make the screen any larger than before. With this kit, the panel is what I would call a proper size, not only getting rid of the need to fit the screen down to the dpad, but also making the screen larger!
Installation is tedious, but not overly difficult if you've done other kits. The two main points to watch for is shell trimming and the wires for the osd. Since the screen is larger, you need to trim the shell a lot more than you normally would have to, since otherwise the shell would cover part of the screen. It doesn't need to be overly precise though, since the glass lens (separate but you get a coupon for it when you buy this, don't forget that!) will cover the trimming. The wires are the other main annoyance. If you only want to use the touch sensor for brightness and the color palette thing, then this does not apply. If you do want the use the OSD, however, you do not need the touch sensors, and can desolder them if you want to.
To use the on screen display, you need to solder wires from the board that that comes with the kit to the select, a, and b buttons (take a look at installation instructions for where specifically). While the soldering is trivial, managing the cables to not interfere with the buttons/fit of the shell is a pain. I would highly recommend either routing the wires with tape, or trimming them and soldering to other points on the board. For the second option, i would highly recommend Makho's video again, where he solders the wires to other points on the board. The second option also has the benefit of hiding the cables somewhat in a translucent shell, since the wires don't have to run to the buttons.
After the install, the screen if fantastic! I've yet to do any battery tests (not had the screen installed for long enough), but I assume it will be a similar jump to the ips kit for GBA. Since the description doesn't seem to accurately tell the OSD inputs (not sure if I got a different version of the board or the description hasn't been updated), the controls for the OSD are as follows: sel+a+b to bring up the menu, a to scroll menu up, b to scroll menu down, sel+a to select an option, a/b to adjust a selected option, sel+a again to confirm your choice, sel+b to cancel a choice (your changes to the option are not applied), sel+b to exit the menu. Note that these button presses are still applied in-game, so I would recommend booting the GBC without a cart to adjust the settings initially.
The one think that I would want from this kit is a precut shell, simply because I tend to get things into a 'working' state and leave them as-is, meaning that my shell trimming tends to be ugly.
The install was easy 3/5 difficulty the results are beautiful and I especially like the OSD controls it comes with. Thank you