Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I was so excited to get this filter set I had to try each out the same day.  At first I didn't understand the idea of a circular polarization filter that spins.  And when I first used it outside my home, it didn't seem to show much difference.  I read the Tiffen booklet that came with the filters and it tells you how the polarization filter works better in certain situations than others.  You also have to be a certain angle from the sun to get the full polarization effect.  But once I got the hang of it after playing with it for a while, I love it.

I like how you can spin the filter because sometimes when you have the effect working while you're holding your camera horizontally, when you turn it for a vertical photo, the effect goes away.  You simply turn the filter until you see the effect again, and shoot away.  One time I was taking a photo of a rainbow and went to turn the camera and the rainbow instantly disappeared.  It's kind of fun to play around with this.  You can also add filters on top of this one, but I'm not sure how that may affect the polarization filter.

Overall this filter kit is wonderful and worth the cost since it normally costs more than this at a photo store.  I haven't played with the warming filter yet, but the circular polarization lens is my favorite and probably will stay on my lens most of the time.  I use this on my Canon EOS Digital Rebel XTi with a Sigma telephoto lens.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive