Purchased for Nintendo Switch. 1080p to 4k upscaling doesn't work as the official spec states that the dongle only supports 1080p 30/24Hz to 4k upscaling (hence one star down). So the Switch only benefits from its image filters and dithering effects. Most 4k TVs have some 1080p upscaling algorithm, so that part is fine for me at least. The improvement in smoothing is noticeable, but it also depends on specific games (their art style and internal rendering resolution). The problem with AA post-processing is that it can only extract information from post-rendered images. So if the sample aliasing is too strong for post-processing, the algorithm cannot help. Another problem with early anti-aliasing post-processing is that the edge-detection algorithm tends to be too aggressive and blurs edges, which it shouldn't (e.g. FXAA/MLAA). This is even more noticeable with a gaming HUD, as on-screen text tends to be jagged and can be blurred by the algorithm. The mClassic anti-aliasing seems to do the job well. In my view, there is no noticeable blurring of the image. I personally find it even better than SMAA for the degree of blurring. A sharp silhouette can have a certain "halo" effect, but that's a common side effect of the image sharpening filter, and the end result isn't all that bad. In the Pokemon Shield, as shown in the attached images, the AA effect is very noticeable on highly distorted objects (in this case, oval ground). Note that the algorithm can't help much with large notches, which is a compromise most AA post-processing should have. But for other, more traditional sprouts, the AA result is satisfactory. The algorithm also does not appear to reduce the effects of temporal smoothing. In any case, as long as expectations are reasonable, the AA improvement with this button is a very nice addition to the mixer's original visual output. The algorithm also appears to not mitigate the effects of temporal smoothing. In any case, as long as expectations are reasonable, the AA enhancement with this button is a very nice complement to the original picture output of the switcher. The algorithm also does not appear to reduce the effects of temporal smoothing. In any case, as long as expectations are reasonable, the AA enhancement with this button is a very nice complement to the original picture output of the switcher. a very nice addition to the mixer's original visual output. The algorithm also does not appear to reduce the effects of temporal smoothing. In any case, as long as expectations are reasonable, the AA enhancement with this button is a very nice complement to the original picture output of the switcher. a very nice addition to the mixer's original visual output. The algorithm also does not appear to reduce the effects of temporal smoothing. In any case, as long as expectations are reasonable, the AA enhancement with this button is a very nice complement to the original picture output of the switcher.