For all of the complaints about not being able to adjust the height for older babies, there is a simple diagram and explanation in the user manual that comes with the jumper:
"If jumper is too close to floor:
1. Pull on small loop as shown untl the sewn end of the loop passes through the slot in the adjustment buckle.
2. Continue to pull out the small loop as shown until the strap is proper length."
These directions along with the picture in the manual make the adjustment very simple. Our baby was getting too tall to just make the normal adjustment and after referring to the manual, we made the change in less than 30 seconds.
This is why user manuals are included with products--read them when you purchase the product and don't throw them away, thinking you won't need them. I hate to think of all the jumpers that were tossed out because parents didn't think ahead.