Whilst it's cool to see Gen III Pokémon coming to GO, the game sadly lost my patronage when they decided to mess about with the servers on the last day of the Legendary Bird event. Myself and a big group of others waited nearly 2 hours cause we wanted to try to get a Lugia, and the fourth try HAD to be it for me, and they went into meltdown mode and we were lucky if we could log into a blank map. And after the poor response from the customer service (Two free raid passes, joy(!)), I haven't touched it since September.
Been sitting on the ropes about if I'll go back and play it again, but after they wrecked my chances for my favorite legendary... yah ^^; I wouldn't have felt bad if we had been able to try and if we failed, but that was something else entirely.