Take advantage of this "affair" because for the price, if this is really a! The quality is great, there is nothing wrong, luxury finish becomes important!
Silent, ergonomic, with its pump system for the zoom, at all! Warning it is very heavy, because of its rugged construction, so consider your muscles up!
The bokeh is not terrible, but will complain in a 100-400?
This is not a goal for wimps. With approximately 1.4kg, if you add a box reasonably Full-Format as the Canon 5D Mark II with grip, it makes you at all to 2,6kg transporter.C'est my case, and I'm surprised early in leaving it around your neck, and I remember it well. Adopt a decision in hand, and a solid tripod!
Take advantage!