This is a stable pairing; however, because of the nature of the 4, you both tend to get somewhat irritated when established routine is disturbed. This can lead to a relationship that is either very good, or extremely stressful, with little room in the middle, and so the compatibility can depend largely on how compatible your daily routines are. Upside of this pairing is stability and security ... the downside is that it is hard to relax, be spontaneous, and enjoy the moment.