There are many companies selling luggage tags, stickers and even products with identity numbers or bar codes that corresponds to an online database with your contact info.

Question: Is it worth it? Does it work any better than a regular luggage tag?

Which system is better? Is any of the systems almost worthless?

Products with this kind of thing:
Okoban (licenses to other manufacturers)
Tripneeds (tags and stickers, uses the Okoban database)
TravelBlue (all products marked with code)
Victorinox (tags and some bags. Swiss Tracker Program)
TraceME
Delta has their own system

I've seen comments for one type of luggage tag that it tended to break off easily, so almost useless. What's the best type of attachment method?