I ordered one of each. For $23 a piece (shipped), they seem like a good deal.
The dotted ones are more like traditional silk knit ties - kind of a waffle knit. As others have mentioned, the quality isn't fantastic, but seems fine for the price. I find the difference in quality for silk knits to be of less importance than for other ties - for me its more about color/patern. These ties measure 2 3/8" at the widest point (about 2 1/4" at the tip - they come in a bit, you can see what I mean on the site) and they're 58" long. It would be nice if the dots extended to the knot, but its not a deal breaker for me (though now that it's been mentioned here it will probably slowly drive me insane
The striped ones are a more delicate, thinner, tighter knit. They are a just a bit skinnier at 2 1/4" at the widest point and a bit longer at 59 1/2".
None of the ties have keeps on the back, and they all have somewhat obtrusive tags that will probably have to be removed. Overall I'm pleased (especially with the price), and I'm hoping these will satisfy my knit tie needs for a while. Thanks again to nerdykarim.