All my Poly stays have been in the Tokelau. Sure you can request a certain floor! Heck I even request a certain room.

What's really nice about the Tokelau the end rooms give you a Lagoon View even though they are in the Garden View category. 1915, 2915 (had that one twice) and 3915 are the end rooms. You can see part of the lagoon and if you stand at the end of the balcony and lean a little bit you can even see the Castle

. My last stay was in room 2916. A big ole tree blocked a part of the view of the lagoon. So you might want to skip 1916, 2916 and 3916 depending on how tall that tree is
Here are views from the balcony of 2915. I did not have a digital camera at the time and have no scanner, so these are picture of printed photos.

The white spot on the picture is from the flash reflecting off the photo.
View from the side of the Balcony.
View leaning a little around the side.
View leaning a little more around the side. But don't worry I wasn't at risk of falling off
Check out Tikimans site there are pictures showing the view from different rooms
http://tikiman2001.homestead.com/tokelau.html
Take Care
Jamie