I decided on the ElectronWarp in good faith of the many reviews and users online recommending it as the best plug-and-play analog to digital converter.
I knowingly paid 1,5x times the actual asking price in shipping without added import tax.
Total costs including shipping and added tax to Belgium (or the EU in general I presume) added up to about 4 times the listed price (or about €80/ $94 american), which seems wildly expensive in retrospect.
However I was willing to lay down that much for the promised improvements (in my case, artifact-free image output and clear sound) over a generic Wii2HDMI adapter, and hopefully, an ideal plug-and-play middle man for a later upgrade with an Mclassic.
Add to that the fact that comparable solutions were even harder to find and/or have shipped to me, or presumably more expensive.

However, the adapter I received does not output colors correctly. It's almost as if the colors are inverted.
Everything is either too green or too purple.
Furthermore I notice next to no improvement in clarity on my 65" 4K OLED.
I was having slight issues with color banding and blocky artifacts on white gradiants before, which I contributed to the previous adapter, but it seems this rather's got something to do with my TV's internal upscaling or something, as the ElectronWarp does not improve these one bit.

I understand and have tried the "fixes" with fiddling with tv settings to get a better picture, but wasn't succesful.
Moreover this would've meant switching my TV to a display profile that introduces input lag, which this adapter promises to eliminate.

Furthermore I am not at all impressed with the build quality.
The adapter feels rather light in comparison to my Wii2HDMI (which, granted, is no correct measure of quality), as well as feeling more fragile, giving it a rather cheap feel.
On top of that, the plastic part around the HDMI port, or rather, the HDMI port itself, seems loose.

The only way in which the adapter seems to improve over my current solution is in eliminating sound peaking, which is just as easily, albeit not completely, counteracted by turning down the volume a little. Perhaps I was hoping for too much.

Add to this the idiotic measures for returning and refunding an international shipment, which I really should've read before buying.
I simply don't see the value in paying what I estimate to be more than double the asking price just to get the product shipped back.

In conclusion, all this expensive piece of e-waste has been able to provide is an insight into how good my "generic" Wii2HDMI really is.
I am thoroughly unimpressed.
Having paid this much I'm suddenly really, really happy with my €10 second-hand Wii2HDMI.

Works great! I haven't played any games, but my kids haven't complained about any lag time or anything else, so it's as if no conversion was used at all.

Works great and fast shipping

Fantastic item that gives the Wii a HDMI outlet without a bunch of wired nonsense.

Pretty good! Maxes out the video quality, but the build quality doesn’t seem amazing. It kinda wiggles.

Arrived quick in great packaging, easy to set up with the Wii and great end result—crisp 480p signal and no lag conpared to cheap analog-to-hdmi converters! Worth every cent :)

Awesome

Many have a good experience with this device, but at least for me, I ended up returning mine. The colors were extremely dark (to an unplayable extent) on both a PC monitor, and projector. I tried to find any settings regarding the "HDMI video's color range" as the support mentioned, but was unable to find anything on either device. Be sure to check the refund policy before buying, because the unusually high shipping cost, and the restock fee, essentially make up half the cost of the device. Probably just get a cheaper model on amazon, or go big and modify a wii with ElectronAVE for proper digital output.

This device just seems an unnecessarily expensive middle ground, with little benefit (or in my case, only downsides) over a generic or 2nd tier wii2hdmi adapter, or going for a proper modded wii with digital output.