Numbers say it's amazing, the latest move rebalance just made it better with the buff to Smack Down. Highest neutral TDO in great league, hard counters Altaria and Cresselia, advantaged against Tropius, good against non-HP Azu, wins Umbreon, wins Munchlax, the list goes on.
Honestly it seems like a monster, but I don't know anyone who actually has one. I doubt anyone has been able to evolve, power up and unlock it without using rare candy yet. I found two before the current event started and wiped away most gen 4 spawns.