Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: how often do you have to change the filter
Document: Great price on this filter. They always work great on my coffee maker and, while I am not sure they need changing as often at home as the recommendation, I always have good coffee. Further, after 2 yrs of heavy (for home) use of my B150 coffee maker, not once has it asked for or shown signs that it needs descaling.
the product solved the problem we were having. our little room with the coffee maker insided started to really smell. found out it was the filter that needed to be changed. problem solved.
Installed this on our machine with the auto water dispenser, its been two years, hadn't touched it and now I've got issues with scale. ran some cleaner through the machine and good as new. After reading reviews of cleaning the machine I think the filter is what saved my butt. If I had changed them according to the manufactuer I'd probably have no problems.
nothiong to adrtess I haven't used it yetwhat else do you want me to say? your more words needed shows you truely don't care about your customers. you should take what they input and not ask for more, just because
This is an awful experience - totally disappointed.
The B150 is the best all around Keurig for commercial use. An auto water fill can be added. It can take the tallest cups of any machine. It a workhorse.
My Keurig is connected to a water line and we have HARD water (like drinking little rocks) - these filters are awesome. Easy to install and they both work great and last a long time - it you are connected to a water line, these are a must have!
I researched for hours to ensure I ordered the right product. The item was being advertised as fitting my system. Well, it didn't. I was so disappointed, I ordered two filters. The company was gracious in allowing me to return the product for a refund. Here's the problem, I spent my time researching the product, paid for the product AND now I have to take time out of my day, pack the product, go to the post office, and PAY to return the product back to the company to get a refund.
Answer: I have very hard water so I end up changing the filter every 4-5 months