Whether or not it's the best game, it's definitely in my personal top 5. Even BADIK fell off that list.
The rating system here is not really reliable. Most games, unless they truly suck, will have mostly positive rating (3.5+)
Negative ratings, are usually pretty difficult to keep up on this site (especially with some developpers where negative reviews seem to be reported very quickly, but that is probably a total coincidence of course) as the rules on rating games in here, are so weird. I've had many negative ratings removed, effectively increasing the score of those games, and I'm pretty certain I'm not the only one like that.
That put aside, with the biggest/popular games, the weighted rating is more accurate as the larger amount of ratings and so on balance things out, mostly.
It is quite an achievement to have, in effect, the top game, done with Illusion's stuff as well. Not many manage to do that. That alone really speaks volume about the game's quality.