Yes to all your questions about the Lazer Z HP. Mine is 6 years old now, 455 hrs, just replaced the left and right arbor bearings and seals. No grease fittings on mine. Sad, can't add them.
The factory guys say folks grease them too much causing overheating of the cavity and seal failure.
Fortunately some of us are smart enough to not pump a tube into each fitting every time we use the machine.
I know this will sound foolish, but buckle the seat belt as you get more familiar with the mower, you can get soooo good that you can throw yourself right out of the seat when doing a steep grade turn at 11 mph.
I use synthetic oil and change the oil twice a season. It's only 3 quarts. grease it every 20 hrs....just two pumps... air filter and hydro filter each season....
I always add an once of fuel stabilizer to both tanks when it gets filled up. The Ethanol addition in gasoline sure seems to shorten the useful life of gasoline. (another way to say: corn is much better as a food or whiskey product, not a fuel additive.)
It cuts my mowing time by 2/3 rds....no negatives to mention.....except that 'Walker' now has a suspension like a Lexus, so 'the back' is much happier in rough, high speed mowing. Maybe next time......
A friend just bought a 72" diesel and it is faster, more economical and more comfortable....but over 12K. Like my brother always says: I don't want to make love to it, just mow the damned lawn! Lazer and Toro are very good products, and all the other folks do a good job also. Like all other technology, it just gets better with time and experience. PS: It is all made in the USA, too.