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Very overcrowded, it's a risk if you're willing to take.
Worry about leveling up first then once you get a like level 150 go to MP3. I went to MP3 at 150 and level all the way to level 175 I could've stayed till 180.
No it's good when I trained there I was getting around 20k every 30 seconds too. It's a good quiet place and that's all you should care about.