What is the best moderately priced Wi-Fi extender?

I live 30 ft away from a Public Library Wi-Fi.
Because I am at the very edge of coverage, my internet was very unpredictable.

They are aware and gave me permission to use the Wi-Fi any time (even when the library is closed)
I have also been given permission to use an extender.



I bought a NetGear 2500 Wi Fi Extender. It
has helped but it still drops the signal almost daily and I have to set it up all over again.

This model doesn't have any external antennae so finding "the sweet spot" is difficult.

Does anyone know of an extender that will work better?

Because it is free internet I didn't want to spend too much but obviously buying the cheapest wasn't the best idea.

Any tips, tricks, or advice are appreciated.

Bueller? Bueller? Any One? Any One?
Does no one have any tips to add to help ?
I am wanting to buy a new extender without spending too much but better than the one I have. Netgear blows!

All the extenders I have used are pretty erratic sorry :(. Best just to check online reviews