I would recommend you use these pools because of their fair payout systems (DGM or PPLNS) that cannot be hopped and because they do not have a mandatory fee.
So they're better than PPS or Score based?
Edit: ozco.in seems to have a 5% fee on PPS.
I would not recommend using PPS at ozco.in. Their DGM payment system will payout 100% over time.
Also, those fancy graphs are good at helping you understand what kind of return you are making and how the pool is doing with variance and other factors.