Has to be my absolute favorite SRB2 character by FAR... and not only because she's my most favorite Sonic character in general. Really thrilled to see an update (that broken tail was bothering me).
I got her a while back and she's been my number 1 pick for custom maps every time. I just love her complex simplicity if that makes any sense. Just two special abilities- tail and triple jump -that, while takes a while to get used to, is so much fun with how versatile her tail is and how you can just swing around at insane speeds with proper use.
That skill floor is also what makes her feel not "cheaty" as many custom characters tend to be. No shade of course, they're still great fun, but I love the challenge that comes with handling Tangle properly and the reward of being able to go just about anywhere in a level. Combat and specially bosses can be a bit awkward, but I take that more as a con to a character with great pros.
Oh, and her being able to be paired up with Whisper now is just delightful. Although it kind of peeves me a little that you can't have Whisper put on her mask in the pair mode. Why doesn't she have it on by default, dammit?! She's running through dangerous levels without proper equipment!/hj
Overall, I enjoy the challenge that comes with handling her tail and the versatility you get with proper use. Great friggin' character.
... Also I got to talk about "handling tail" a lot. :V