I have most of their cool products, and use most of them often. I have had Audio Hijack since its baby days, and have watched it grow into a full featured, mature program. I was used to the older interface, honestly, so the newer interface threw me for a loop for a while- I kept using the older one because it looked more familiar, and I knew where everything was. There newer interface, while taking some getting used to, seems to make sense. It didn't feel like a huge improvement from the previous version, so that's why it only got a 9/10 for me. The previous version was a 10/10. For that price, for what it does, its practically a steal.
I use it quite often for recording from my tape machine, or sometimes simply recording sound-design/manipulation sessions. It is really a very useful program.
I tested recording a bunch of different sources at once, and it worked (essentially a multi-track recorder) but I really wouldn't use it that way. Still, its useful if I am trying to capture an interview and Skype etc. I've used it to strip audio from streams (to manipulate), and for recording interviews. But, the sound-play/manipulation is the funnest- just let it go while you have fun.
The key here is if I have an idea, its fast to set up and record. On many of the DAWs I will spend a ton of time pulling up templates, checking inputs and outputs, etc. By the time I have all that, the idea might be fading away...I could record it on any number of other devices, but this just works for me. Then I can send the sound file to wherever to work more on it.
Check this company out, I've only had good experiences with the support, as well.
I use Hijack Pro to have all my audio output filtered through my IK Multimedia ARC2 system. I guess it's not the main purpose of the program, but that's essentially what I bought it for. It works nicely but it has a small bug: each time I close Hijack Pro, an error window appears saying that the applicatioon quit unexpectedly, and I have to click "Ignore" to close that error window. It doesn't seem to be a serious bug, but it is bothering. (My system: MacBook Pro retina late 2013 with OS X 10.9.2.)
Unfortunately, Rogue Amoeba's assistance doesn't seem to be as good as the program. I contacted them by email 40 days ago and described the bug. They replied and asked my to send them a log file. I did that at once and they replied saying that their engineering team would take a few days to analyze my case. I have never been contacted again and other emails I sent them to have news about my case got simply ignored. Lack of assitance and lack of politeness too. A simple "we are still working on it" would have been enough.