Just wanted to chime in that I've been reasonably happy with MyTailor shirts, at least considering they're about 1/2 the price of something like Brooks Brothers MTM.
My biggest complaint is being able to know what you're getting in the fabric. Their online swath images are lower resolution and poorer in color accuracy than their competition (e.g., moderntailor). If you look at fabrics they label "white" for example, some of the photos will be medium grey, some baby blue, some brownish-green, and so on. I'm pretty sure they are all close to white in reality -- unless Joe is totally colorblind -- but to know the subtle differences in shade, who knows given those images. It's even harder to get a sense of the fabric texture and weight from their images.
So far I haven't been too unhappy with what I've ordered, though I did have one white fabric, an "executive" pinpoint, that ended up being incredibly thin, cardboardy, and see-thru, unwearably so in my opinion. I've definitely not ordered as many shirts from them as I would have with better online fabric info.
I'd love to see Hemrajani put better photos on the website, or do like modertailor and send out swaths. I'd even pay $5 a swath if that were the only option -- beats buying a $100 shirt and not liking it.
I realize they do travel with fabric books, but my area only gets visited infrequently -- seems to be when I'm away on business, usually -- and never by Joe himself.
I will take cropknox's advice and email or call Joe before my next order to get some fabric advice. My biggest problem is finding white fabrics that are opaque enough, so maybe Joe can steer me to some if he knows that's what I want.