Nice unit - heat pumps are real money savers - your utility bill will look much different next month. Keep in mind many local utilities give you a rebate on your purchase for installing an energy efficient heat pump.
Unfortunately for me, an 'off the shelf' heat pump water heater won't fit in the basement where the heater currently is. There are mini-split type ones, but their rarity means much higher prices.
We're installing minisplit HVAC in 1/3 of the house next week, to take the $2k federal credit next year. Another minisplit HVAC in a different 1/3 of the house arrives in January to get that credit in a different tax year. We will put in the HP water heater sometime after that. Not clear if I can capture the credit the same year as either of the HVAC rigs. After that, my oil burner is strictly a backup system.