for my experience
overrated:
- Sleipnir (good yoyo, but many others YYR are better)
- Draupnir (great yoyo but not as they say)
- Chief (never managed to replace my Avalanche)
- Sovereign (heavy and slow, because the extreme weights distribution is wrong )
underrated:
- Tyy-01 (impressive, light, fast, precise … only the Ti-Walker precedes it)
- Bully (nothing to envy to a Peak… I said everything.)
- Z-on (bought by accident, still it amazes me today, for each throw)
- Phenom (worthy of the name he bears, among the best bi-metal ever made)
- Turntable (the weight distribution of this yoyo should do school!)
- Start the Riot (big yoyo, I prefer it at the more his famous cousin Draupnir)