I wanted to change the bands on my Seiko Diver and my Citizen Eco-Drive Diver.  So I bought this tool.

I'm giving the tool 5 stars because it does what it's supposed to do at a reasonable price.  The prongs are very sturdy and should last a while.  How do I know?  I abused the heck out of it.  For those contemplating changing the band yourself, let me tell you, it's not that easy.  The Citizen band came off without a great deal of effort. The watch is brand new and the spring bar is pretty small compared to the Seiko.  Got it off without much issues using this tool.  The Seiko 007J is a different beast.  It's about 3 years old but hardly worn.  I tried and tried and no matter how hard I tried, the spring bar would not compress.  I used excessive force, causing the prongs on this tool to start to bend.  Then I used it in the opposite direction until it starts to bend the other way.  The spring bar would not compress.  I think there is no other tool that would not bend under such force.

I ended up taking a scissor and cutting the band away from the spring bar.  With the band off, the spring bar would not compress. Mush have frozen in place for some reason.  I ended up using a small wire snipper to cut the spring bar in half.

The lesson is that the Seiko is much tougher to get the spring bar off.  The tool is sturdy and would work under any other circumstance.  My experience truly put this tool through excessive force and it held up.