Love ours, use it more in the winter than any time. Shovel a path to it and we are good to go.
One thing, get the LARGEST wire you can to feed the power to the tub. Yes, the wire will cost more right now, but,,, the over-all savings is substantial.
It works like a garden hose, it does not really matter how much force is behind it, the hose is only so big and you will get only what the hose can deliver.
When it comes to electricity, bigger is better. The motors will have their full need and work easier, thus, longer life on the motors. Also, your electric bill will be less as it travels with less resistance through the wire.
I literally bought and used welding wire and have NEVER had an issue.