I used to work for a custom widow treatment place or two. I have used Select blinds. I'm not sure of the price comparison with the other companies but am satisfied with the product. They have mini blinds and all types of shades. I have gotten both and they did well with all three of my orders. I like the double pleated shades that can be raised and lowered from the top or bottom. They will send free samples of the colors you are shopping for also. Installation is fairly simple, a small drill if the window sash/ moulding is brittle and wants to crack and a screwdriver.
+1 for Selectblinds.com. If there isn't a member you're going to go through, I would recommend using them. Their prices are way cheaper than Next Day Blinds and if you can wait to buy, they always do a buy 3, get 1 free at just about every holiday and they do free shipping. While renovating my house, I spread out the blind purchases over several holidays to get their deals.