This will be by no means a complete review, it's just my opinions on the product for the amount of time I've used it. OK, so let's begin!
Interface
The first thing you see in an application. Not a bad interface, it's colourful to say the least. Easy enough to use, could be complicated to configure (if needed) for someone new to Personal Firewalls.
Minor Annoyance #1
Every minute or so, I am told that a specific trojan port is being probed. I am behind a NAT router with SPI and no ports forwarded. Go figure.
Minor Annoyance #2
The program freezes slightly after confirming the Accept/Deny alert window. Slight annoyance.
Protection
It passed the GRC Outbound leak test (DIFFERENT to grc.com's Port Scanner). And failed TooLeaky. Half and Half, really. Doesn't give me TOO much faith in the product, but testing with two tools is far from an extensive test.
Memory
This is a plus point, memory footprint is the lowest of any PF I have used, apart from LookNStop.
Overall
Not really up-to-scratch for me. The constant popping up of "This trojan is trying to get you" etc.. is quite a bad point for me. It can be turned off, but I have to draw the conclusion that these are either very bad False Positives or a shoddy way to say "Hey, I'm working!". As mentioned previously, NAT, SPI, No Forwarded Ports. I would like an explanation, from the coders, or the public, on how this is possible.
The only things going for it IMO are memory and interface. Although the interface may not be to everybody's taste.
My Score: 5/10.