Overall I like his sister's company a bit better (originally the company his parents started). But some things I still buy from Penzey's. I haven't found any buttermilk (i.e. "ranch") dressing we like better than Penzey's. And the pickling spice is very good, though you have to like star anise. It's a more expensive blend compared to the usual.
I like their blue cornmeal... but it helps that I'm near Fort Worth so I can just pop in for this and that rather than making a big order. I'm a big fan of five spice, and cumin is a staple herb in this house.
Their shallot pepper has French tarragon in it and makes a wonderful addition to sauces if you like tarragon. The salt free Mural of Flavor is great. Most of my spices are from Penzey's. (I love shopping there when we go to Kansas City)