I've had Du-bro, Bondhus, and DuraTrax. I much prefer the DuraTrax because the handle doesn't shrink as you go down in driver size. The Precision set as illustrated here http://www.duratrax.com/caraccys/dtxr0380.html shows the handle style I prefer although I never bought a "set" since my LHS sells them individually. I keep the good one's at home on my build table and use the Dubro & Bondus in my flight box. But I do like the way the bondus keeps the screws attached and feel the temper on the tips is more durable.

Lastly, while I much prefer the ball-head sometimes it will slip if the angle is too much or the screw low quality and only a genuine allen head shoved in deep and firm will maintain its purchase.

Regards,

Clay