Rereading my previous post I think it is not quite clear. What I was describing is a 'pedicled' thigh phalloplasty (where the graft blood supply is not cut). This is in contrast to a 'free' thigh phalloplasty where the harvested tissue is entirely detached before repositioning.
Much is made of the disasters we see with MTF genital surgeries, but I think that FTM is worse. Sure, MTF's have a lifetime of dilation and the wound is prone to infection, but ultimately they can keep it in their underpants, (Apart from those choose to post pics on every social medium.) Furthermore, standing up naked, it may not be obvious how badly the MTF's genitals compare to the real deal.
Compare that to the situation for FTM surgery. Depending on the type of phalloplasty they have, it's 2-3 operations even if things go smoothly. They have a huge full thickness wound and then a skin graft to cover that wound; if they go to a pool/beach they will have some pretty extensive scars to hide. Mastectomy scars can be hidden somewhat by working out to beef up their pecs, but the scars from where they had their thighs/forearms flayed are pretty horrific and are too rectangular to look like a burn. These scars will 'out' them even before they hoy their pale (phallopasty?) knob out. This is all expected from a 'normal' surgery, without getting into the horrors of the nerves failing, the urethra closing up or the neophallus losing blood supply.
On the issue of the girthy willies seen upthread. these come from the thigh grafts. As I understand it, forearm grafts give the best results with regards to appearance and sensation, but the graft site is very painful, and complications are more likely. Thigh grafts end up being really big as the thigh has more subcutaneous stuff before you get to the blood vessels and whatnot that the surgeons need. In short, you can't use the arms of a FTM who is too thin, had previous arm surgery or has blood supply issues to the arm. It is also not recommended to use the thighs of an obese FTM.
Compared to the above, metoidioplasty seems comparatively sensible.