Tamron 17-70mm f/2.8 reviews?

I have a6000 and 6700 bodies that I use for everyday photography. Considering buying my "lens for the year" next month and I'm considering the Tamron 17-70mm f/2.8 aps-c. Already have the legendary sigma 18-50, but the extra reach of the tamron might be useful. If there are any recommendations for a mid-range budget telephoto, those might be a good alternative. Thanks in advance!