Although AFAIK Temper hasn't been under development for a couple of years now, it is still a decent DAW, and one of the best for free. For people who want to start off without paying a lot for a professional DAW, this is worth trying.
It has all the important features like loading VSTs, MIDI, automation, routing, etc, and is relatively simple in layout. More advanced stuff like send tracks, sidechaining, tempo change etc. can become very tedious though.