The Good:
-The chemistry between the leads
-The reasonably good acting
-The good special effects (I'm assuming Wang An Yu and co. cannot skate at the level shown in the show, but the CG? sure looked believable)
-The high quality production
-The moms ended up being a lot more tolerable than what I initially thought would be possible.
-The weak love triangles
-The fluff (though there could've been much more of it)
-The race in the last episode was pretty exciting and all anime like.

The Neutral:
-It's a sports drama first & romance drama second.
-The second lead couple's problems
-The silly, but still somewhat restrained villains.
-The (happy) ending is only so so. (reasonable for a sports fan, not so much for a romance fan)

The Bad:
-The overall story is extremely juvenile. (13 year old me would've loved it)
-The sports related subplots were really really silly as well. (don't expect an authentic speed skating experience)
-The production team could've picked a taller more athletic looking FL.
-After about 10-15 episodes it started to get boring. (not the fluff, but the skating)
-It's way too long.
-The leads took forever to get together.
-Coach Ulterior Motive
-The whole assist thing (though I've seen something similar in the Olympics in a running competition)
-Redemption arks
-The unreasonable character rewrites
-Snaky Snakewoman