I thought I'd post a 30 month update.
I did add chains to my MZ, and they do help quite a bit with control on slopes. I solved most of the scalping issue by raising the cut height. While it's still cutting unevenly due to my rough lawn, it's not nearly as noticeable. I'm still scraping the grass from under the deck after almost every mowing, but I bought a MoJack, which greatly eases the job of raising the mower to get access for scraping. Mechanically, the MZ has not missed a beat. Always starts easily, still as powerful as the day I brought it home. No issues with belts or bearings.
So I have adapted to using it. But if I had it to do over again, I would have looked elsewhere, and I will look elsewhere when it's time to replace it.
Rob
I hate it that you didn't come here almost 3 years ago before investing in the Bad Boy MZ:0(
I too looked at Bad Boy ZTRs in the fall of 2012 when I was shopping and along with some warnings I got on these forums I looked at but definitely did not consider the ZT or MZ models that TSC carried since (1)they are the entry level residential Bad Boy ZTRs and (2)TSC is not a "dealer" which you now understand the importance of, since you basically ended up doing your own repairs even during the warranty period. I did consider the 54" Outlaw(at the local Bad Boy dealer) which is a 1,230 lb(5gauge deck) beast, but as you stated....heavy duty, engine power, blade tip speed, etc. doesn't necessarily make it a professional performance ZTR. I read many user reviews of the Bad Boys and owners either loved them or hated them. That kind of mixed reviews for a $7,000 ZTR made me second guess purchasing one. Also, there is a link on these forums to a National Dealer Survey and the Bad Boys aren't rated very good by the dealer sampling in that survey. Another bad sign(if the dealers have negative reviews...do I want to buy one?). I'm glad you seemed to have worked though most of your problems and found workarounds, but hopefully some prospective ZTR buyers will read your first-hand experience with the BBMZ and look for other options.
P.S.
When you get to the point where you feel like you have come close to getting a return on your investment and are ready to replace that BBMZ....I definitely recommend that you look at the Gravely line if you have a dealer nearby. I love mine and you will be hard pressed to find any "mixed reviews" by any of their owners.
42 month update.
I am now at the end of the mowing season for 2014 (4 seasons), and the right-hand transaxle of my MZ is failing rapidly. I first noticed it a mowing or two ago. It's gotten worse rapidly, and it now struggles hard to turn left. It is not a serviceable item. The cost is ~$516 plus shipping, plus a couple hours of work. I called BadBoy and talked to three different people. They say because it's out of warranty there isn't much they can do. I was finally forwarded to "the boss" to see if I could get any sort of reduced price, but got voicemail. I will be surprised if he calls me back.
I'm not sure whether to bite the bullet and replace the transaxle, and hope the left-hand one has several more years in it, replace them both, or to throw in the towel and buy another mower.
Once I worked through the initial quirks, the mower has served me adequately (barely). I am still manually scraping the crud from under the deck after every mowing, and the mower still "blows chunks" if the grass is anything except bone dry. I have lived with it. But to have to put $600 - $1200 in parts in a 3.5 year old $3500 mower is not something I expected to have to do.
I will never buy another Bad Boy Mower.
I'm open for suggestions as to what to possibly replace it with. As I mentioned earlier, I mow about 1 1/2 acres, with some slope, and several obstacles to mow around. My lawn is not a fairway. It would be nice if I did not have to scrape the deck after every mowing. I do not want to spend $8 to $10k for a dang lawnmower.
Thanks.