I've been using one on an Encore for two years. As accurate as any barrel, no problem burning powder (I've used 777 and American Pioneer), but with the porting, it is LOUD.
When I shoot with friends who have non-ported guns, the difference in loudness is noticeable. The ports also foul faster than the rest of the barrel, which can make starting bullets harder.
It is also easy to carry, especially in the thick stuff.
But if I had it to do over again, I think I would go with the regular barrel.