The reason I gave this 4 stars instead of 5 is that this screwdriver is a bit pricey and also a bit large for a 3.6V model.  But if you do a lot of electronic assembly or repair, this is the screwdriver for you.  This model has a 2 speed transmission with a surprising amount of torque in low gear and fast (600 RPM) in high gear.  The most important feature though is the electronic clutch.  You will not strip even the most delicate screws with this screwdriver.  If you are looking for an all purpose drill driver or you want something with lots of power, the DeWalt may be a better choice as it is cheaper and more powerful.  But if you need a screwdriver for delicate work that is fast, fairly powerful and won't strip out small screws, this is the only choice.  Normally, I say the more power the better but if you want a screwdriver with a precision clutch for delicate work, this is THE tool for you.