I have a fairly strong army where I can take on easy raids alone (Electabuzz, Egsectuor, Vaporeon, etc). While at KD Fri evening for a couple hours and all day yesterday, the problem I kept running into without fail - my phone would overheat and close the app down!!
I can tolerate the heat fine, but my phone, no so much.
I'll probably get all kinds of fun raid booses come winter when the temperatures are cooler.
Sadly, I don't even have a bronze medal yet - I have 7/10 for winning a raid. Mostly because of the heat and my old Samsung S4 isn't playing nice.