There are so many options, but I narrowed it down to 5 things: There had to be a charging plug, not just a USB cable; flexible extension hose; a thin crevice tool as I will be using it primarily for cleaning the car interior; the ability to absorb even small wet spills: and at a price of no more than $35. This little vacuum cleaner met all my needs so I took a chance after reading all the reviews and so far I'm very happy with it. I actually bought one for my son at the same time because he mentioned he was considering getting something similar too. I haven't used it long enough to check the battery life, but it sucks well, it's easy to clean, it comes with 2 filters and a nice little bag to keep everything. Happy with my purchase.