I think Charlee gives you some good tips.
I've not used either system, but I had a good friend who recently moved. She used a POD, and the benefits I saw were that she was able to store a lot of stuff in the POD while her house was on the market, so she was able to present her house without clutter and valuables. Once the house sold, she packed the rest of her stuff, moved it, and was able to unpack the POD at her leisure, instead of cramming everything into her garage and unpacking everything in one day.