Not that I noticed.
I touched the unit after each pack and it was cold. I was running 12 and the air temperature was around 26º Celsius.
The case is in fact an aluminum heatsink, so it will help a lot in dissipating any heat produced.
To be honest I didn't find a heat problem on the NOSRAM or LRP but some people complained about that.
If I were you I would try it pronto. It's a very good ESC.