After many, many years of using Sonar, it came to a cross-roads for me many months ago. Suffice to say I became unhappy with both the direction Sonar was moving in and it's performance and decided to make the break.
At the time I tried just about every DAW that offered a trial version and spent some considerable time with each. The last on my list and one I nearly didn't "Bother" with was Reaper, after all how can a DAW costing £45 ($60) be even worth considering against the big-price-tag companies. To my total amazement and disbelief, for me, the absolute winner by a large margin was Reaper. Then I read about Justin Frankel and his mission.
Interestingly, the DAW in last place for me and one I would never get was Cubase, other people might may have different thoughts but this is how it was for me.
It is true to say that Reaper does have a learning curve where things are done differently or different terms for the same things used in Sonar. However, with patience and perseverance and a superb community, I soon became familiar with Reaper's ways and found my enjoyment and trust of using a DAW returning. Reaper is outstanding.
Oh .. I nearly forgot to mention that for the best part of a year I've been using Reaper, it has not crashed, frozen, crackled, failed to render and hasn't audio-dropouted not even once in all that time .. and this is with 8-10 hours continuous use some days.