Given the good deal, I would get them without any hesitation for your house. One of the guys that helped us re-frame and re-roof the pool room at my brothers house has the Ridgid kit, and they worked just fine. The only complaint was the cordless circular saw that has some sort of current draw watch dog, that shuts the saw off when it thinks it's pulling too much current. Stop the saw for 3 seconds, pull the trigger again, off you go again. The drill, impact, sawzall, and nibbler worked perfectly.

I use my 18v Dewalts (drill, impact, sawzall, bandsaw, and grinder/cutoff wheel) everyday. The only downside is that after 2 years, the batteries don't last as long as I like. Not a huge deal, since you can buy knock off's of the Dewalt XRP batteries, except more AH than the XRP batteries, for $50 for 2 batteries. We have replaced all the original non-XRP batteries with these and it's not cost prohibitive, and they last quite well through a day.