I have a standard sized staircase, which the lindam stairgate doesn't fit. I bought the gates for my parents too for when they have the grandkids and it doesn't fit their stairs either ... maybe lindam should reacquaint themselves with the sizes of staircases and plan accordingly ...
Regardless, the extensions do the job, making a too small gate fit my stairs. It's an extra expense I could have done without having already bought four gates - these extensions are about the same price I paid for each gate, which essentially doubled the price I thought I would have to pay in the beginning.
If I was buying again I'd look into alternative brands and buy a stairgate that fit in the first place. But if, like me, you have the gate and it doesn't fit, then these extensions should do the job.