I was thinking I might get a BOB trailer for the Cross-Country bike tour I was going to do after I graduate (summer after this one). What are the advantages of it vs. panniers+rack? It seems that after I buy the rack and panniers, the total cost would be as much as the BOB, but I'm not sure.

Has anyone used both and liked one especially over the other. More importantly, has anyone used a bob trailer and NOT liked it? I searched the forum, and I found a lot of positive feddeback about the trailer, especially on tandams. However, I'm sure there are concerns that I need to be aware of before I make this investment.