To me peat pots and peat pellets are two different things. The thangs in the pic are pellets, the pots are the square container things made out of compressed peat that you fill with whatever medium/seed startin' mix you use.
You have to keep the peat pellets moist. Keep them at around 80+ degrees F, rip off the netting and transplant to like a 4" container before the roots come through. (even if they're through a bit, I don't trip- I just take it easy on em.)
I've always had good luck w/ peat pellets. I hate peat pots and pretty much all seed starting peat mixes. The pots always seem to suck any moisture outta the medium- and if you have a peat based seed startin' mix in one of those pots- things can get pretty jive pretty quick.
I planted pellets side by side w/ rockwool starter cubes this year. The rockwool germed better, but the peat ones took off (grew) faster.