I recently watched a video of all the instant kills in the most recent version of Guilty Gear. Everything was so terrible, I can't believe this game is treated as a master piece of fighting game choreography, these finishing moves are hardly actual attacks and they're just silly weird cutscenes. Oh and the character designs, woof. I'll never get the appeal of ArcSys fighters.
Depends on what version you saw.
Guilty Gear happened at a time where Street Fighter III and Garou : Mark of the Wolves displayed incredible animation. In comparaison, Guilty Gear was REALLY bad looking.
But, the first game, even with its extreme unbalance was able to create a whole genre (People like to call them "anime fighter", i dislike that a lot, i prefer the term "airdasher") with whole new ideas. That's why it was very well received.
Oh, and myself, my own controversial opinion is that i never understood the appeal of Street Fighter from a chara design stand point. They are just so generic, or i just don't get the humor... I don't know. And even from a mechanic standpoint, I began playing fighting game with Street Fighter 2 and thought it wasn't for me. It's only when i took Guilty Gear X that i finally thought "oh ! i get it ! It's actually fun and cool !". Maybe i prefer the whole craziness of ARC Sys chara design. That's the appeal to me at least.
PS : Oh yeah, and i dislike the concept of parry in Street Fighter III a lot. Sure it's cool to see Diego do that set but what it means is that most characters evolved to be a "mix grab and rush" characters, a lot of concept like zoning is way less present in that game because of that mechanics. The parry is so strong as an option that i'm under the impression that things like pressure is futile because the opponent can always counter by a parry.
Finally, i thought the parry was not a very interesting thing to learn as a beginniner.