I ordered from them for the first time last year because they had some specific things I wanted. The seeds came fast enough, and the germination was fine. An interesting seed list, with good germination info on the website.
I ordered again a few weeks ago (their seed list seems to have grown quite a bit from last year), and the seeds were in my hands within 10 days (haven't started them yet).
I haven't had any reason to seek out any customer service, but they seem like they're a very small operation just judging by their seed packaging. I like the idea that they're in Minnesota where it's even colder than where I live, so when they've grown the plants they're selling, they can offer up useful info.
I've wondered if you have every heard of HardyPlants.com? I placed an order with them back in Aug 2001 and never received it. After a couple of email exchanges in Dec I was told that my order was on the way. Still no order or response from them.