Although I don't own a Suzuki Manji, I DO own several Suzuki harmonicas (both diatonic and chromatic) and I assure you they are good harps. Their quality gets better as they rise in the cost ladder (just like Hohner harps). My Suzuki MR 350 Promaster is a sweet, and comfortable, harmonica. It sounds good, plus it's great eye-candy.
Having looked at a close up of the Suzuki Manji online, it appears to have a recessed comb
under the coverplate (which means the coverplate is on top and sticking out a bit). This may or may not allow for some sharp edges against the mouth (which may make it uncomfortable to play). It also looks as though it could be rather "unforgiving" of a moustache (just surmising here...).
Alex, have you looked at any Seydels yet (aka C.A. Seydel Sohne)? Specifically, the "Blues Session" or a "Blues Session Steel"? They're similarly priced harmonicas, but their coverplates are recessed into plastic combs, thus making sure there are no sharp edges to cause discomfort.
Plus, with the plastic comb, they're washable
(which will eventually come in handy)!