I use and recommend the Sawyer water filters. They are efficient and do the job well, but as with everything, there is a little room for improvement. Video blogger Homer Mayo has a few modifications that look like a real improvement to the filters. He designed and built a pre-filter system that is inexpensive and should lead to longer filter life. As he points out in his video the Sawyer is a good choice for a modestly priced water filter but it does not help much with the taste.
In order to improve taste you need to add an activated charcoal filter to remove contaminates that make the taste less than optimal. Homer has a good hack for adding a charcoal filter to your water work flow. He will be doing a video in the near future going step-by-step through the process of modifying a charcoal filter to use with either style of Sawyer filter. I will be doing a review of the Sawyer Mini in the future, but my initial uses combined with a wealth of good reviews tells me that it is great choice, especially for those on a budget.
Check out Homer's video: