I have to say I really like the Max machine Worx 900. I run one personally on my boat, and I have run a bunch of power to it with great success. Also, the customer service over there has been so awesome, it's worth the price of the drive. In the same breath, I have a customer with one of my 900's that runs an XR drive, imco lower and a get real performance billet cap on top. He changes his oil every 10 hours and has 70 hrs on the drive. There is NO sign of wear when we have changed the oil. I can tell you that he is very smooth on the throttle and does not hammer on the boat, and that is why it lives. It doesn't mean he does not run the boat fast, he just doesnt drag race it.
One of the things that makes this TPI 848 efi so nice is that it has just enough power to run your boat plenty fast and smooth, and it is not quite enough power to have a bunch of drive trouble(If you take care of your drive). I have a bunch of R & D in this combination and I feel it will please many customers. Especially when they tell their insurance company they only have a touch over 800 hp to thier prop. It's the truth.