Here's the link. I tried using it myself by converting a 480x272 source to 704x396. And while I did notice an increase in footage quality, I wasn't all too sure if this same increase in quality could've been obtained through the use of some avisynth filters. But then again, this was the very first time I used the plug in. So there's a good possibility I didn't set the filters to the right settings in order to get the best possible results. There's also the fact that I'm not very good at looking for all the little details within the footage to come to a solid conclusion on the matter.
To sum this up, I'm looking for some opinions with regards to how effective this upscale plug in really is. If you've used it before, tell me what you think. Or download it and mess around with the plug-in for yourself. I just want to know if this plug-in is really worth my time or not. Because at the moment, I'm not entirely sure.
*edit*

*edit#2*

Here's a sample. The left side shows the results using the plug-in. The right side shows what the original 480x272 footage looks like after being upscaled to 704x396 without any filters. These results could most likely be reproduced w/ avisynth, right?