I’m a bit of a pedant when it comes to these things and have spent rather too much on them. Recently I’ve been using a Topeak Smarthead which was good (if a bit stiff) for a while but it became unreliable when connecting to car valves (it failed to depress the Schraeder valve pin).
I ordered a similar SKS unit and it was sent back because it didn’t work with car valves (the recess is not deep enought to depress the pin). This was sent back.
I have a dual head SKS head which was awkward to use and very hit and miss when connecting to the valves and often allowed air to escape throught the other valve hole.
I’ve got a new Topeak Twin head and it is very stiff in operation and does tend to lose a fair bit of air.
Finally I found this here Beto head that is most economical and is very easy to use on both Schraeder (car) and Presta valves. It has a much lighter action than the Topeak Smarthead which I had originally.