I did intend for this to be a replacement router, but after receiving this product and playing around with it, I realized there are actually tons of other uses for a box like this. I bought the FW4B with 8GB RAM and 128GB HD. This is a complete PC with support for 2 monitors.  I went ahead and installed IPFire on this one, and everything went perfectly. I have not experienced any heat issues with this unit and it's fast. Fans are one of the first things to start going out. Since this unit has no fans, it's not only quieter, but should last longer than other hardware with fans. I will likely be buying more of these later.