Product review (4 stars): Good filter for the money, but I had to adjust the height with a pair of scissors.
I've went through a personal 'renaissance' the last two years, overcoming and adapting to some medical issues.  They've been dealt with and I feel like my 'old' self again.  In the process, I decided to get a fresh filter for my older model Sunbeam humidifier.  The old filter was not pretty, I hate to say.  I shopped here and found this as a price improvement over the 'factory' filter that was very expensive.
it arrived perfectly, but when I tried to install it, it was too tall and the frame of the Unit would not 'seat' all the way down.  I did a little "Kentucky windage" measurement, and trimmed off about 1/4 inch of material with a pair of scissors.  That did it and I've been using it for a few months now.
If you don't mind the possibility of making a manual adjustment, this is a good filter for the money.