These fit well and worked fine at the beginning, but after a few weeks they do not "wick" the water up into the upper part of the wick. Above the water line the wick is essentially dry. The Emerson wicks are about 2.5X the cost, but work at least through the entire winter. While these certainly seem like a bargain, I was surprised that they stopped working almost completely within weeks. I won't get them again.

These air filters were exactly what I needed and were about 1/3 less cost than the local "Big Box" home improvement stores. Great service.....they arrived in the time frame they were expected.

I live in the Midwest, and during the winter the air here gets really dry. I picked up a consol humidifier a few years back from a big chain home improvement store. I was figuring I could also get the filters from the store in the years to come. The following year when I went in to get filters for it, they were no where to be found. I was really disappointed. However I was able to find the HDC-12 type filters on Amazon and purchase them that way. They were even cheaper than anything in the store. I use water treatment in my humidifier too, and with that I can make one set of filters last the whole winter season (usually anyway, I do check to make sure they have not turned completely crusty). I found these filters purchased on Amazon to be the same quality as what I originally purchased in store. To me they make a world of difference. Without a humidifier I wake up with sore throats and sinus problems all winter. Running the humidifier solves all these problems. I highly recommend if you live in an areas were you have to run the furnace extensively in the winter.

Satisfied for the price. Tried another brand at a higher price and they fell apart as I placed then in the humidifier. These lasted me 6 weeks before stuffing up but I do have hard water and used an additive to help prevent this. I guess that was to be expected so I can't blame the wick.
Otherwise, for the price I'm satisfied with the durability and wick action of these wicks. I am ordering another set to replace the now hardened ones and if I go through a couple sets over the winter I don't think that's too bad for a unit that runs most days 24 hrs a day.

In a pinch, these wicks will work. However, don't expect the same performance as the stock wicks, nor the longevity. When I first tried these, I was pleased, because they did work noticeably better than the stock ones once they've reached the end of their life. We have hard water, and it's especially hard on these wicks. For it to say "Extended Life" on the box, and to get the amount of use I was able to eke out of these (maybe a few good weeks total?), I can't really be overly positive about the product. Unfortunately, these aren't even much cheaper than the Essick ones (when I went to the store to pick them up, they were rebranded as AIRCARE HDC12, but they mention Essick on the box).
I don't know if it's just the paper pattern used on these, or if it's the quality of the paper, but I felt like I had to replace these with the Essick ones just about right away to get much noticeable improvement in humidity in our home. As I said, they do work, it's just not the level of functionality that I was expecting, given the "Extended Life" and other claims being made. They're just OK, and if you don't need your humidifier to give you more than a little boost at times, maybe they'll work out for you, but in the Midwest in winter, we run our furnaces quite a bit, and we need all the humidity we can get.