Here are some reviews from Softpedia on OS4
Linuxed - Exploring Linux distros also did a review of OS4 OpenDesktopComputerWorld Interview
Here is what some are saying about Black Lab Linux
" So far it all just seems to work. Videos on Maxkeiser.com which are purple skinned in Xubuntu and Mint KDE have the correct flesh tones. Pulse audio works with my Logitech camera/mic, even Skype works after some tweeking.
I my opinion Black Lab Linux is better than Mint 12 xfce, hands down! It is the fully functional replacement for Gnome 2.3 that I have spent months looking for."
" I bought a few copies of Black Lab Linux and its a strong distro. Its really, really nice. So for Dreamlinux users its a good choice. Black Lab Linux is a commercial distro and there is nothing wrong with being commercial. I have tried the free versions, 12.5 and 13 and from the help I have gotten from those guys I would buy a support subscription. They are knowledgeable, quick to get back to you on topics and quick shipping. I think the way Black Lab works it is great. You can download it for free, you can use it free but if you want things like on site service and support and phone support you have to subscribe. Sounds pretty reasonable to me. Now, when my bosses give me permission to get the extended support if it turns out not to be good, I'll be the first to come back and say it. So far though, Black Lab Linux is where I'll stay."
" I have been keeping up with this distro since it reached 12.0 and this thing beats the Mac, it beats Linux Mint and its a solid OS. I recommend this to whoever wants a great stable desktop where everything works."
User from Softpedia
"Just finished my download and installed. This OS is awesome. Definately my Linux of choice. I love the presentation of Black Lab Linux. Great job"