I find this interesting - my preferred shipper is UPS ground and I have had great results with it. I have shipped all over the eastern US and it is a two day delivery for under $18 (most are around $15). I can track it from my shipper location to my customer's front door. I do use breather bags and small styro coolers packed tight with shipping peanuts so that may explain my good results. I have used USPS a few times - but I prefer the tracking offered by UPS ground. I am a bit OCD
when I have fish being shipped and like to check on them several times to make sure all is going well (at least according to the UPS web site). Just my two cents worth.