I'm new to MTM/bespoke and starting with MTM has been very helpful for me to learn both what I want and how to interact with the tailor to make sure I get it. And MTM is less expensive.
On another note - I've been lurking for quite a while. This thread has been quite helpful so I figured I should contribute some info as well. The owner from Goshe told me they are starting a MTM suit line at Classic 101 (their other store across the street). Limited fabric right now, but it looked nice - Scabal (I think) bolts and Loro Piana books. Starting from high 600's and I got quoted 790 for a suit out of one of the bolts. I haven't taken the plunge yet, but thought I'd share.