I bought this to replace another portable AC unit that was older.  This one cost quite a bit more than I paid for the other one, but the GE has more BTUs.  It's just used for emergencies when power goes out, if we need AC (runs off a generator).  When I tested it, it started blowing cold air almost instantly, and it's very cold.  I think this will do an awesome job keeping a large room cold.  It's very easy to setup as well.

For the reviewers complaining about the hose falling out, it has to be twist locked into place to stay in.  Once it's locked in, it doesn't fall out.