It's not really clear enough to contrast inside/outside, as there's a bit too much depth of field blur, so to me, it's just distracting. The subject of the image is the cityscape, but this bright area keeps trying to pull my eye to the bottom of the frame.
Re: filter. I find it gives a very slightly more saturated feel to the sky, and makes colours just a bit more punchy (depending on the angle of the light - it's most noticeable with the light at 90 degrees, and barely noticeable with the sun behind or in front of you), but it's really useful for minimising reflections in glass or water, and it gets rid of haze in bright sunshine. http://www.offrench.net/photos/articles/polarizing_filter.php Plus, leaving it on more or less all the time, if it gets scratched it's less than £20 for a new one rather than having to buy a new lens.
no subject
Re: filter. I find it gives a very slightly more saturated feel to the sky, and makes colours just a bit more punchy (depending on the angle of the light - it's most noticeable with the light at 90 degrees, and barely noticeable with the sun behind or in front of you), but it's really useful for minimising reflections in glass or water, and it gets rid of haze in bright sunshine.
http://www.offrench.net/photos/articles/polarizing_filter.php
Plus, leaving it on more or less all the time, if it gets scratched it's less than £20 for a new one rather than having to buy a new lens.