The unit works great, but was very complex to set up.  It took 3 of us to put this together in the window.  Most window units are very straightforward, however, I will say that this unit works much better than any other window unit I've used in the past, and even seems more effective than an old portable unit with 14,000 BTU we used to have.  If the extra assembly is what allowed that to happen, it's definitely worth the trade off, but you may want to consider paying for someone to help assemble it if you're not handy.