The biggest "Pro" for this company is that you get to keep a suit for about the same price or cheaper than what you can rent it for.
The "Cons" - not the quality they claim to be at all. Very lightweight fabric that tends to "cling" instead of hang nicely. Sizes are very broad and all needed to be altered in MANY places - not just waist and length as was suggested. ESPECIALLY the shirts. Getting a shirt in the correct neck size created a giant shirt throughout the mid section. Save your money and go buy a great shirt anywhere else for cheaper and will fit!
Also, you don't really get to see the exact suit you are ordering unless it happens to be one on their rack. Colors are difficult to match and fabric is different.
Finally, the tailors they suggest are very nice and very inexpensive - but they are not the best.