This is a fantastic little present for any bird lover. Blue tits are by far the most common bird to see on my window feeder and up close... they are stunning :) Way better to see when standing a foot away from the window than in photos or on TV. Although the birds were shy at first and took a while to come, they eventually became bold, I even whipped open my curtains one morning and suprised a Blue Tit which fluttered in the air for a moment, then carried on eating with me looking right out the window at it. I still can't figure out how much they can see through the window, obviously just a small amount of movement.
I would recommend purchasing this feeder with the bird ball holders rather than the simpler seed feeder. The bird balls are by far the favourites. It is suprisingly small, but then again, it doesn't really need to be that big and it doesn't block the view if put in a corner of the window. The suction holders seem particularly good. Mine has lasted 4 months through some pretty tough weather.