Hi there,
don't know the school, so I can't comment on it!
But regrading the time frame "zero to hero" (zero to CPL/IR - single & multi engine) in only 16 weeks, I can tell you from my experience as a flight instructor that's pretty tight. Without thorough preparation in advance, regarding the theoretical part (PPL, CPL and Instrument) and taking into account other aspects like, the weather and possible cancellations, additional time for ground school/studies, unexpected slow progress, will there be a substitute aircraft in case yours is down for technical reasons or maintenance? In general it's nothing uncommon that people/students frequently overestimate their flying skills and as a consequence are frustrated if things don't go as expected or as promised by their fight school. Don't underestimate the time and effort you have to put in to earn your wings, particularly if time is limited! As mentioned above, this requires thorough preparation in advance (home study course). Long story short, I think 16 weeks is not really realistic for the average student and I'd rather add a few more weeks and Dollars, just to be on the safe side!
Good luck!