Not hard at all front are component might take a tad longer to install (a couple more steps) the rear speakers are super easy
One of my neighbors asked if I had put a sub in my ECO after listening to me drive by one day. The base radio can shake the rear view mirror if you run the right noise (music) through it. It does take a few thousand miles to get the best out of these speakers though.Stock Cruze only has six inch speakers, don't expect to get much bass with six inches.