I have 2 Neato D7's and have tried several 3rd party filters but so far none have held up as well as the OEM filter. They filter much better. Aftermarket filters don't last as long, are difficult to clean, and hold a lot of debris due to the size of the holes in the mesh. They are best used when you need filters. The only downside is that they're a bit more expensive, but if you look at them, they're going on sale. I was able to sell them for $12 which was a great price for 2 considering the latter are 2-3 times longer than an aftermarket filter.
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