I went through a month's supply of strattera before switching to adderall. I also only took it on "need to be productive" days, which may have been the wrong approach. I was reluctant to take it otherwise because of the side effects. I felt like it did help me focus on tasks, but the benefit was essentially offset by the drowsiness it caused making it something of a wash for my productivity. I work at home so I would end up needing to take a nap most days I took it. Sleeping became very refreshing though, which was a silver lining.
Other symptoms were a pounding head, a decrease in appetite, and an increase in anxious thoughts. None of the symptoms were intense except drowsiness, and all of them mellowed out after a few weeks.
Adderall works a lot better for me now and has fewer side effects. But I've seen others in the community really appreciate what straterra has done for them, so it seems to vary a lot from person to person. Despite my disappointment with it, it may be worth trying if stimulants aren't working well for you. My doctor recommended it initially because it was working well for some of her other patients.