This part of the update is required if you have purchased the Dyson v7 car and boat version. The only downside is the assembly. It is very difficult to remove the foam filter without proper tools. This could easily be remedied if they included better instructions or videos, as well as some sort of hacking tool to open without marking or bending the part. After a bit of use I can say it performs the same as my other full size Dyson Hepa filter.