I've had 4 different ponderosas over the years.
The only one that tasted decent was the one grown in Mobile AL. The farmer market would buy then from me for $1 each and sell them for $4.99.
They were huge and tasted as a normal lemon would taste, but maybe a little better.
The other 3 trees grown more southward weren't that great and had thick, thick rinds.
All of them grew like circular weeping willow bushes and full of giant spines.
Other than being a giant lemon and great for zesting, unless they are grown in cooler climates, I just don't think the taste is all that.
Mine would set a huge crop one year, and a scarce one the next