Hi irene,
MTM to my understanding is if you like this particular part of the gown A, another part of the gown B and you like certain kind of pattern not found in the particular bridal shop, you can combine all these of what you want onto your WG. Then you can get MTM pkg. And esp if this shop doesn't have your size or length, you can MTM.
That's y it's impt to try gowns at the shops you shortlisted. Some people may have sign pkg during the fair but when they really go down to try gowns (btw i think during the fair, you wun get to try gowns), they found that the shop dun really carry their size or length Off The Rack (OTR) so, the brides "bo bian" got to top up the pkg to MTM lor.
MTM can be stressful for some brides esp if you dun have any designs in mind. Some designer may not be that pro too. Some brides may ended up MTM a WG but dun like the end product cos what they imagine and what it actually turn out to be is soooo different that they bo bian got to wear it during AD.
So you got to know what you want...