MaidSafe recommends that we use the EldoS Callback File System for Windows. They also seem to say that the CBFS is not necessary, but that things run better with it. All I can find about pricing for this software is in the thousands of dollars, even for a single computer.

How necessary is the CBFS?
How much better would it make the MaidSafe system run?
Are we each going to have to spend $thousands just to get MaidSafe to run on our individual computers like it should?
Or is there a free version somewhere?

https://www.eldos.com/cbfs/order.php#product
https://www.eldos.com/cbfs/price-list.php