Ok first of all.. for the price there is probably nothing better on the market right now!! it is slick.. smooth.. SILENT.. small but not too small and fits your palm ergonomically!..
There is absolutely Zero click noise on the left and right click buttons.. for the prize I am not complaining..
I do have two issues.. and that is why its not getting 5 stars.. Number 1 - there is NO off button.. so the mouse stays on all the time.. (Now.. it says there is an automatic off feature.. but I have used 4 Panasonic AA batteries in the last 2 weeks.. My Logitech wireless mouse that I use in my office has had the same Panasonic batteries since I bought it 3 months ago.. and the logitech gets used more) the remedy to this is to take the batteries out when you are not using them which is a hassle..
the 2nd issue is that the usb is open and not covered.. I personally have had no issue with this but someone could clumsily lose the usb and then the mouse will be useless
hope that helps