I am new to Yerba, but really wanted to try it, but then saw all the different types and blends, and became quite unsure as to where to start. I ended up reading nearly all of the reviews on this site for guidance, only to discover that shipping was quite pricey compared to the price of the product (shipping for me would have been nearly $4 more than a $12 bag of Yerba) so I decided to "go BIG, or go home!" and opted for the free shipping w/a $50 purchase. I'm glad I did, because I am really enjoying the Yerba that I purchased!
This Roasted Mate is just one of the 4 types I ordered. It brews a nice dark, rich, cup of tea which I decided to try as a "Yerba Chai Latte" - I added Allspice, sweetened condensed milk, and a little evaporated milk (measurements based on my taste-buds) and OMG, it is my new favorite drink!! :) I had to force myself to NOT make another one this morning, so that I could try out another type of Yerba that I purchased. As I type, I am drinking my first cup of Gaucho Fuerto w/ a dash of cream. It too will make a very nice spiced tea. The first type I tried when my order arrived was the San Mateo, a wonderful GREEN blend - I want to try it as a cold beverage with fruit or citrus the next time I make it, as I think that will be quite nice!
All in all, if you are new to Yerba, like I am, a good summary would be to think of Yerba as very close to tea (If I didn't know any better, I would have thought it was tea!) and as tea, each variety is slightly different. I've tried 3 of the 4 I purchased and am pleased so far, so I think your best bet would be to just pick one & go for it! I really don't think you can go wrong w/ any of them! :)
*Also, I noticed some online reviews complaining about sticks/twigs in the mix, but it's my understanding that these add to the flavor, as well as act as a filter for those drinking in the traditional way with a bombilla. Yerba is blended with differing amounts of stem (sticks) etc. based on country of origin and method of consumption (cold, hot, in mate, or in coffee machine...)