Aside from being "hook in a box," it's also amazingly smooth, some of the best continuation I've ever seen from any bowling ball ever made, and with the right drill and surface prep it's very versatile.  Hank Boomershine and the Roto R&D guys spent two years developing this ball, and it shows.  The core and cover are just amazing.  Compared to the T-Road Solid and Attitude Shift, it'll be earlier and smoother, but more continuous.

Just look around this forum and you'll see the amount of praise the Cell gets -- it's just that good of a ball.  And if you understand some of the technical aspects of bowling balls, the seminar Hank Boomershine did about the Cell is really cool, if long.  There are 9 parts total, you can click through them all if you are interested:  http://www.youtube.com/watch?v=VMtLhywZVjA

Don't hesitate to give the Cell a try, Dan is right on with what he said. I would say the Cell is probably one of the best and most versatile balls I've ever thrown. I've used the ball with box surface and high gloss polish and its been great with both. I'm actually going to pick up a couple more Cell's to put different drill patterns and finishes on. This is something I've never done with any other ball but the Cell is just that good.
--------------------
Jason Smith
VISE--The Choice of Champions

Mark,

I've thrown all three.  I would agree with the versatility comments here and throughout the Roto threads.  But the one word that describes the difference between the Cell and let's say the Attitude Shift is continuation.  Storm has clearly gotten the message with the Cell - they are now offering a 'comparable' (note to Roto People - I said comparable so don't bite my head off) ball with the new Dimension.  Again, continuous seems to be the word.

If you are looking for a med heavy to heavy oil ball get a Cell or a Dimension.  Cell has a great track record and the Dimension seems to be the Cell's slightly longer, slightly snappier cousin.  Pick your ball motion and pick up one of these.

If you want to see what a tweener can do with a Cell take a look at the PBA Summer series events.  Danny Wiseman is a perfect example of what the Cell's continuation can do for your carry.