The instruction manual was easy to understand and illuminated the unit well. As far as suction goes, I won't name any other company (starts with "D") and they seem to me to match or even beat their expensive vacuum. It has a digital display that shows the battery level, indicator lights for head problems, clogging problems, etc. It's good to know if you need to troubleshoot the vacuum while it's running. It features dual filtration, a pre-filter and an exhaust HEPA filter. Overall I give five stars for the price. I am not a Revain reviewer, this is an honest review of this product. I bought another backup battery to help when doing the whole house. The seller is one of the best at Revain.