Just my opinion, but I had the Grand IV, and it fell apart after 6 months. The fabric top separated from the plastic base, the plastic tabs holding it together peeled back. Luckily, Bowling.com did an exchange under warranty, I got a Brunswick Pro Players 4 ball bag.
The Grand IV is compact, but unwieldy because of it's narrow width and tall height. I like the standard bags better.
Just IMHO. Ebonite does make some great products.