I learned about this adapter for my Nintendo Wii from the people over at RetroRGB, since they have a console info section and promote this product for a plug and play Wii to HDMI adapter. This product is wonderful and has no issues transmitting the Wii's SD video and sound over HDMI. No noticable ghosting lines (had that issue with a generic Wii HDMI adapter) or quality issues. Combining this with disabling the deflicker filter via USB Loader GX on Wii homebrew and post-processing with some games results in basically the best picture you can get from the Wii without using a scaler like the RetroTINK 5x Pro or 4K, or using Electron Shepherd's native digital HDMI picture hardware mod. The product also has a very tight grip on the back of the console so you're unlikely to knock it out by accident, and the grip appears to also be tight for the HDMI connection on the adapter.
I think the only "criticism" I could mention, not necessarily a huge deal and it doesn't knock off a star from me, but the Wii's picture is a limited color range picture, like the Wii U. I was under the impression the color range for the Wii was full range, perhaps incorrectly so. One of the replies to a 4 star review from Electron Shepherd suggests that the ElectronWarp's HDMI settings outputs a full color range. Either that isn't true, my product is defective, or maybe there's a misunderstanding on my part. The HDMI black level (color range) on my TV has an automatic setting which correctly sets the picture to a limited color range (called Low on my TV), with the full color range (called Normal on my TV) being washed out. I don't necessarily think this is a huge deal given that my TV can correctly process both full and limited color range but perhaps the reply to that review could either be misleading or confusing like it was for me when I figured that out.
On a more positive note, surprisingly, the 240p video does actually work on this product as intended! My HDTV processes 240p video correctly (not incorrectly deinterlacing it) and it looks alright. I had no idea my flat screen TV was even capable of correctly processing 240p video over HDMI but results may vary for other flat screen TVs.