Been using REKO for 7 months and very pleased with results:
Casino/ Playing Hrs/ Win Rate/ #Decks/ Rules/Conditions
A/ 26.5 Hrs/ 5.73 Units/Hr, 6D/ S17, DAS, LS, 75-80%Pen
B/ 16 Hrs/ 3.43 Units/Hr, 6D/ S17, DAS, NS, 67% Pen
C/ 141 Hrs/ 3.92 Units/Hr, 8D/ S17, DAS, LS, 75-80% Pen
D/ 8 Hrs/ (loss) -19.32 Units/Hr, 8D/ S17, DAS, LS, 69% Pen
E/ 14.5 Hrs/ 13.77 Units/Hr, 8D/ S17, DAS, LS, 75-80%Pen
F/ 7 Hrs/ 7.36 Units/Hr, 8D/ S17, DAS, LS, 75-80%Pen
Total: 213 Hrs, 4.02 Units/Hr
I know I am well ahead of EV and not complaining about it, and right now I see no need to move toward a "higher level count". Maybe I'll feel different when EV starts to level out. Unfortunately, I overstayed my welcome at casino C and she's gone.