It depends on your resources, if you can aquire Titanium(IV)Isopropoxide/Sodium Borohydride, then by all means use that method, as it uses less amine (nice if you are going the methylamine route), it can use any amine (imperative for MDA) and it also runs cooler, which means no fumes. It also is nicer to use on a small scale (<5g). On the other hand, the Al/Hg is cheaper and more OTC.