I bought Corolla Xli in 2010 and install power windows in it. Till today I did not get any complaint.
Now again I have booked Corolla Xli 2014 and I have contacted same person to install power windows in it.
There are both option available for power buttons. People who dont want to spend more money they can you Original Xli door panel where as who want complete Gli or Grande look then they have to change the whole inside door panel.