I have one of these units at my work and a z-boost unit at home.  To be honest, they seem to work equally well.  But, after a year and some months, I had a problem with this Wilson unit.  I called customer support and actually talked to a helpful person located in the US!  He offered to replace the main component for free even though it was out of warranty. When it came I hooked it up and everything works great again.  And, I actually got a call a week later from the same tech support guy asking if everything was working OK!