We had previously hired Moncada to do two other jobs (one door, one window) and been very satisfied, and had in fact recommended them to many people. We hired them again, late last year, this time to do a number of windows and a patio door. The windows went okay, although not perfect by any means. The patio door has been a nightmare. We are now at 7.5 months since installation and the thing is still not right. We've had every kind of runaround. Moncada and the manufacturer both say its the other guy. We've been told wind coming in between the patio door panels is normal, as are bowed frames and door panels, locks that don't hold, sitting in the back yard and hearing normal volume indoor conversations through the closed and locked door, etc. etc. I'm not optomistic that this 4200 patio door will ever be right. I can no longer recommend Moncada to anyone.