Betsy, IMO it would be difficult to 'enjoy the view' from a table at Carette Trocadero. There's usually lots of people milling about, waiting in line, etc. etc. The restaurants there are packed together, so there are often people waiting on the sidewalk to get in to those restaurants, too. There are Métro stops at the intersections, which adds to the congestion of people. And, personally, I'd steer clear of any of the restaurants on that Trocadero circle. Super touristy, super crowded, super expensive. But...that's just my opinion. If your primary goal is to see the tower sparkle, then I'd go to one of the Quays by the Seine (left bank has some little guingettes in the summer, right bank often has marriage proposals set up at sunset, which are so charming to see.) If your primary goal is to get the Carette hot chocolate, I might try a different one other than the Trocadero location.