I've seen that lantern before. It was the price that put me off. Does the price reflect the cost of the solar panel, or just the lantern?
Eventually I settled for this LED lantern, combined with seperate battery solar charger and batteries. At least there is no built in battery to die on me at the wrong moment. The total price for the set up I bought came to about the same price for your lantern .
Now I have the solar charger, all the batteries I use are rechargeable.

http://outdoorsuppliesuk.com/12ledlantern/ledlantern.html