It is the only one that is PowerPC native and it works well. I use it on my home computer without any problems. Although a little sluggish, reliability seems good. 2.5.x - I recommend it. Lastly, there is the newest PPP, Rockstar's 2.5.x and most recently, FreePPP 2.6.x .
Reliability seems good.
Commercial versions - I can't comment. Sorry, I haven't tried any of them. Otherwise, I'd go with FreePPP 1.0.5 . OK, Step 1 - get the software. FreePPP is here .