I have a couple of HBs, just because they are so inexpensive. My take on the P bass is based on my P-J.
The internal body cavity routing is dreadful. There are some areas where there is actually no wood to take the scratchplate screws. The electricals are doubtless nasty as well: we will have to see.
On the other hand, and I might have been fortunate, I have managed to get a really nice low action, and it is very playable.
OK, it's not the real thing, but I have added a Wizard Thumper pickup, and it sounds great with D'Addario ECB81's. The stock J pickup is louder than the Wizard, and I just dial in a touch if necessary.
For the price, it is excellent. I am going to give it a public run out at the weekend.