150+ flavors to choose from. Quite a few are spot on, some are a little light even with flavor shots, some have a bit of a chemical taste. I don't think anyone would consider most of their juices to be "premium," but there are two flavors from them that I love and reorder again and again and, to me, those two flavors are on par with the premium juices I've tried. So it's a bit of a trial and error I guess? Out of the 12 flavors I've tried with them, I've quite liked 8 of them. 2 out of 3 ain't bad at the prices they charge, which brings me to....
They have some of the best prices in the business. 4.99-5.99 for 15ml and 7.50-8.50 for 30ml. You're not going to break the bank trying Mt. Baker juices which is nice since there's no try it before you buy it option over the interweb.
They are always ready to answer any questions you have about products or juice or ordering. They also mix their juice fresh at the time of order (at least I've personally never had a date on my bottle older than my order date) and still manage to get the order processed and shipped with lightning speed. All of my orders have always come in three business days and I'm on the opposite side of the country. They also give a free 15ml sample with every order over $15 which is a nice touch!
Great prices, great service, and juices that are hit or miss... But when they are a hit, they are very good. Be prepared for some trial and error where the flavors are concerned, but also prepare to be impressed with how affordable it is and how fast they process and ship orders.