I love this sprayer!  I am used to using Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer which works great, however, this thing works way better in my opinion.  When I mix up a batch of weed killer, I usualy need to use the whole fill when using the Stanley.  With the Solo one, I used a little more than half to cover the same area using what seemed like the same spray pattern.  So basically, I get better coverage with the Solo.  Also, it is very comfortable and I really like that the wand sits on the handle rather than on the back of the unit like the Stanley.  Overall, I highly recommend this sprayer if you are looking to get a backpack style sprayer.