RCM Lipo impressions

[q8-maxx]

I just received my packs (2 2s 5200mah hard case). from Mike all the cells are 3.85v reading in the balancer. its take about 40min to fully charge for each pack at 2.5amp
now all the 4 cell reading 4.20 on the charger.

Do I have worry about my new MMM (just got it from tower last week so I think its v3) or its ok with Mike lipos?

my setup e-maxx + 4.5 hv motor + 2x2s 5200mah hardcase + MMM + 12/72 gearing

but mike lipo's looks great and nice built all the cells are equal. its seems they balanced very well.