Hard to clean
shoots like crap in colder weather
Too many color choices ( sarcasm )
Overall this is my favorite barrel its rifled and it gets great distance almost comparable to the flatline, It's also very quiet . I have the 13" and its very very accurate if clean and the conditions are right however if a ball breaks in the barrel it doesn't matter how many shots you take it will not clean itself due to the rifling ( it actually causes more to break ) . plan on having a squeegee on hand to clean it out and you will have no problems. If you have the cash and want a very good all around barrel then this one is for you I paid around $100 for mine but it was worth it to me .
This has been a very good barrel , would recommend it to anyone.