Old thread, but I've just visited MJ Bale in DFO Homebush, and tried on both a Samurai suit and a shirt.
It's a different fit from the "drop 8" I left with: much, much slimmer. I sort of fit a 42, but the Samurai looked like it would explode at the waist yet had quite a bit of bagginess on the bottom left and right of the chest - more specifically, the area in front of the armpit. I've seen this before on a fully canvassed jacket I got altered after losing so much weight that it was impossible to restore the beautiful shape of the original - the chest kind of "bites" into the armpit space and folds back under. Looks awful, and it was a bit unbalanced with one side having more folds than the other. This could be because I'm more O shaped than V. The fit was perfect around the neck, which is something I really like with MJB, and the suit moved around fluidly despite having its vents stitched up.
Shirt-wise, their 41 "super slim" shirts are fine for me, but the Samurai shirt in 42 (theoretically bigger) was way too slim, the buttons looked like they'd burst, even more so than with the suit.
The fabric for the suit was a very fine wool which seemed already roughed up despite being hung up for sale - like a suit you'd have worn for a couple of years. Maybe it's been on the rack for a while, or maybe it was second hand - I noticed a half inch stain on the collar. I've never been a fan of high S numbers, preferring the drape and durability of double digits.
Now, the plural of anecdote isn't data, but here's your extra data point for the Samurai.
Would I try their custom service?
Well, MJB in general seem to know what they are doing. I'd rather wear their (on sale) $400 suits any day over the admittedly more detailed, but considerably more expensive and shinier Zegna stuff just a few shops away. The fabrics are beautiful, and they are cutting costs only on details that can be done without (e.g. no working button cuffs, no working boutonniere, but it's the right length and shape, only half canvas). It's a nice soft style that is perfect for the Australian weather. I have no idea if it is intentional but the logo reminds me strongly of Brooks Brothers, maybe as a tongue in cheek reference (the BB sheep is being airlifted comatose, the MJB sheep is victoriously lifting up a banner, Aussie Aussie Aussie!), and BB is a brand I sort of trust even if I find it overpriced outside the US.
"MJ" knows what I want! BUT... the girls staffing the shop, whilst very friendly, did not seem that well trained or to care much about men's fashion beyond being enthusiastic about their merchandise (it could just be because it's a DFO) - in fact, they give you a 10% off voucher to get alterations done by a stand in the middle of the corridor ($15/$27 for trouser length adjustment without/with cuff, with the discount). Personally, if I didn't already have a tailor, I'd buy OTR and get it adjusted. I also think MJB generally will fit better if you are athletic and V shaped. Still, it's a pleasant surprise to find this in Australia where virtually everything is extortionate compared to any surrounding nation.