Product review (5 stars): Replaces bellow on Whirlpool Duet Model wfw9150ww00
My 3 year old Duet washer began randomly shredding clothes a few months ago.
After doing some homework, I found that Whirlpool replaced the previous part with this one, presumably to address the issue.

***Important point*** On this Duet model, wfw9150ww0w, the entire machine does not need to be taken apart to replace bellow.

I decided to replace it myself, but the repair seemed daunting, based on the repair videos that require the disassembly of much of the washer.  After watching another Amazon reviewer's suggested repair link, I was happy to find that this repair can be done from the front of the machine and requires only a screwdriver and pliers (I thought I had to buy specialized tools).

There are no panels, switches, or controls that need to be removed.  You remove an outer spring clamp and an inner screw-style clamp.  Pull out the bellow (this took a bit more tugging than I expected) and replace.  It does take time to situate and seat the bellow, requiring some patience.

On the item itself, so far so good.  I can see that the new part makes the gap around the door that was catching clothes much smaller.  This is definitely a diy project, so comparing the cost of a repair man VS the $ to replace the machine VS the cost of this part; I'd say for the money, this is definitely worth a try.