I had the 3-4 option sp edition until I sold it when I pulled a back muscle when I lifted it with 4 balls in it. I now have just the KR 3 ball special edition. It is a great bag with lots of room and real easy to lift and get around in tight centers.  A friend of mine has had his for over 7 years. I`d say you can`t go wrong with it. It also has a 5 year warranty

2 seasons ago I had a 3-4 Hammer bag. Liked it very much Have a regular 4 ball roller now,very wide, not as easy to get around at tournaments. If you need to carry an extra ball I use a joey. Works great and you can take the ball out before loading it in the car.
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"We are all one"
Visionary test staff member

I have the brunswick 3-4-5  It had a hand grip sown only to the fabric and it ripped when I tried to lift it fully loaded. I cut that grip off and only use the one on the bottom and the handle for lifting.  Also, I have a tough time getting my shoes in the shoe compartment.  I wish I had stayed with the Storm Rolling Thunder 3 ball bag.