It's a great package and the cost is reasonable IMO for what you get - pretty much a drop in and drive setup. Unfortunately what most people will only see is the end $$$ figure and get scared off. They'd prefer to spend a total of more money in smaller amounts over the purchase of individual items.
If somebody asked me to spend all the $$$ I've sofar spent on my car in one lump sum, I'd tell them to get stuffed! but because I've drip fed the money in over a period of time - it doesn't FEEL like I've spent so much!