I have DEI remote starts on all my cars and trucks and they all work flawlessly. The most I spent on one is about $50 shipped off of EBay. Installing them is time consuming but easy. Look up your car on http://www.bulldogsecurity.com/ they will give you a list of all the wires you need to tap into. Most newer remote starts don't need a tach signal to operate so that makes the install a little easier too.
DEI makes a shit ton of different named remote starts from Viper to the cheapest looking $20 one you would find hanging on a rack at Walmart.
Most of the time I believe you get what you pay for, but not in this case.