Anderson -
I do use rewire with Reason - I would be greatly interested in your insight to gain and/or add new tools to my "toolbox".
 

I use it occasionally with Notion but try to avoid it as it's a fiddle to setup.

I've never used it with Sonar but I used to ReWire Reaper into Pro Tools. It was pretty rock solid and enabled me to use a lot of synths without 32-bit Amateur Tools crapping out on me. The only downside I guess was having to open and close both programs when loading a project. Other than that it worked perfectly. 

reason is half my set up itb, so its a way of life for me to rewire reason into sonar, or any other DAW

Very interesting responses so far. Now that I think about it, Reason is kind of an alternative to Komplete...what with Thor, Kong, Subtractor, Malstrom, and the NN-XT, that's a pretty cool collection of instruments.

Can I do all the midi and automation in Sonar, send midi to Reason and get multi channel audio back to Sonar for processing? Basically treat Reason as a multitimbre synth plugin? 

I tried it when Groove Agent didn't work properly with Sonar but gave it up. Too complicated and other drumsamplers arr far ahead and work better with Sonar than GA.

musichoo
Can I do all the midi and automation in Sonar, send midi to Reason and get multi channel audio back to Sonar for processing? Basically treat Reason as a multitimbre synth plugin? 

I think that's basically the point of ReWire. I don't have Reason though, and consequently very little use for ReWire. Might try it with Notion, didn't even consider that.

I use it with Notion with great results. I bought Mixbus 2 this year, but I haven't gotten a chance to try ReWire with it yet. I guess I should be thankful that I have been to busy to experiment too much this year. I had an LE version of Reason when I was doing a lot of hip-hop and rap sessions and it worked very well. 

I bought Reason 2 probably ten years ago, and using it as a spare "synth rack" within SONAR via ReWire was all I ever did with it (hated the sequencer). As far as I can remember, stability was great and the features worked like they should. A bit of a hassle having to run two different apps and load/save two different session files though.

I've since found VST alternatives to all my favorite Reason synths/patches, so I don't even keep it installed anymore.

Sven