I do not think I have enjoyed an add-on as much as this. It is a perfect mix of speed and combat prowess!
The Homing Attack-type attack feels amazing for momentum. You can flow from enemy to enemy in a NASTY combo that can just tear apart hordes of badniks. It feels about as good as the Shadow add-on, and that is some high praise! When paired with the Slam attack, I can tear apart the GFZ boss in 16 seconds.
The Slam attack is not only a good "OH CRAP!" option for if you need to quickly fix your trajectory, but it is also a GREAT repositioning tool! Not to mention you can use it out of springs! I especially love how it can break breakable floors, but not spikes, to make for balancing.
The Parry was somewhat counter-intuitive at first, since you have to come to a full stop in a Sonic game. But I see the picture. Perhaps mapping it to Custom 1 would make it better.
The Wall-Run controls work very well, too! I love how you need to utilize your momentum in order to attain the most height. However, one can climb a wall by repeatedly initiating a wall run. It is rather slow, but it makes for an excellent explorer character as well, especially with the breaking property of the Slam.
All in all, Wido is a great All-Rounder character, with excellent balance between her speedster, brawler, and explorer traits. I recommend her for any moderate to high-level players! 15/10!