I have an OSSC but because the N64 doesn't have RGB this Solution was a great Offer.
I've also tested it with the Super Nintendo that usually runs over the OSSC or directly on an old CRT, the Results are similiar, even if the Smoothing is a bit to much in Case of the SNES for me, but you can shut it off, so everything is OK ;)
Can't feel any Lag.

So for everybody that want's a great Way to put on his Nintendo Consoles, this is a good Solution.

Bought for use with a stock Ice Blue PAL N64 and a 32" Samsung flatscreen and the results are incredible. I've tried a few solutions for flatscreen N64 gaming before and pretty much always get an uninspiring, sludgy mess on the screen. The RAD2X blows everything else out of the water and every game I've thrown at it looks and sounds excellent (Goldeneye 007 with the 'Smoothing' switch set to on is the best I've seen). Highly recommended product and 1st class service from Retro Gaming Cables, as always!

I have try with other solutions (an HDMI converter/upscaler + a modified AV with S-Video out) and the RAD2x is from far the best solution for a LCD TV, specially if you have a RGB N64. The antialiasing switch is perfect for a 3D games and I have plugged on all the time.
The only bad thing is that it is very difficult to get one...
I made a review in my Youtube channel: https://www.youtube.com/watch?v=yrh2TcYUM58

This cable is all you need, if you want to play N64 on modern flatscreen TVs, even if it has a 4K resolution. It is fast and has an incredible clear picture even with composite cable (regular yellow AV out cable) in composite mode. The colors even mor saturated and more clear if your N64 console exhibit a RGB mode. In this context: The RAD2X is a easy, cost efficient and small solution with a very high picture quality and down to no lag image processing.

This thing is awesome. I couldn't even play my SNES on my monitor with a $20 RCA to HDMI converter, the quality was unbelievably bad. The RAD2X is only twice the price of the cheap converters and the quality is infinitely better. I can finally play my SNES on my monitor and not get motion sickness. The sound is pretty decent on my headphones too. The RAD2X will probably be the best $50 I spend all year.