This is definitely a great cartoon, or at least from what I remember. This series, which I remember watching once on video tape and getting it, is the only one I really saw (aside from Sonic X, which is unfortunately anime) and why I'm talking here (this might also be how I first learned of Sonic the Hedgehog). It's pretty odd that people said that this cartoon was horrible, since only 4 or 5 of the total comments talked of dislikes to this. The animation, which I saw a little, really isn't that bad. Okay so it's not really up to par like most other American cartoons, but it's still really not "cheesy," as most people like to say (I wonder what that means as an adjective). Another thing is that some say that it seems to be a Looney Toons spoof, but to me, it looks more like a mixture of Garfield/Pink Panther/Care Bears/Spy vs. Spy (by Antonio Prohias) theme.
While not as serious as the Saturday version (Sonic the Hedgehog "SATAM") or even the one from France/America (Sonic Underground), it still seems to be even better than something violent, vulgar, and tasteless nowadays (and they say anime has better animation). This appears to be a comic series with a whole bunch of laughs like in Garfield and Pink Panther episodes. There's even safety segments called "Sonic Says," similar to the "Garfield Quickies" with some excellent advice on how to be safe and good.
While I've really only seen this series, I'd recommend any Sonic animation title you can find (Adventures of Sonic the Hedgehog, or AoStH; SATAM Sonic, and Sonic Underground.) But I'm doubtful with Sonic "OVA/movie" as well as Sonic X, since their animes, which are cartoons to watch out for, mind you. But if you can find this series especially go ahead and get it. Even if the story lines and animation aren't up to par, it still has side-splitting humor that's just as good as the said cartoons above!