Pros
CSUSA is an NYSE traded, large HVAC contractor and service provider. They have built their original core on ACTUAL companies with organic services and revenue. In most other areas of the country they have bought HVAC companies and grown artificially into a very large "company" who service almost every state.
Cons
In the course of wall street (OPM) expansion and buyouts or 'tuck-ins' or 'roll-ins' as CS calls them, they are very decentralized, which isn't necessarily good or bad. In some parts of the country they dominate and provide killer construction and HVAC services. In other parts (Tampa Bay and Florida) they have failed miserably to make a positive impact in the most HVAC-heavy state in the country. In Tampa's regional offices, they've gone through as many as 5 or 6 managers since 2010. They've churned and burned dozens of Techs and Sales people as well. CSUSA may be good elsewhere, but they have sucked, and continue to suck in Tampa and Florida, from what I hear and have recently heard (Dec 2014) from insiders still there.