Manu,
I was one of three owners of an IFR-equipped 150 that we bought because we had kids that were learning to fly age. It worked for the kids and for me. I flew it IFR pretty regularly, as once a week I had to commute from the west side of Michigan to the east side. It was a minimum two hour drive one way. When the weather cooperated, I flew (and I shot some instrument approaches to minimums). The 150 is a wonderful airplane and can do a great deal if you recognize that its speed means range limits and it was designed for Americans of the late 1950s who weighed a lot less than we do now. Make sure that the one you wish to buy has a useful load that is acceptable.
That 150 had a "six-pack" for instruments, but its avionics allowed shooting precision instrument approaches (ILS). A six-pack does not mean that it has limited IFR capability - six-pack just refers to the flight instrument presentation that became standard with all airplanes as of 1968. The ability to fly IFR depends on the avionics installed.
Thanks for the heads up on the useful load, Rick - I'll confirm. For now, my main mission is to get my PPL. Then will putz around a bit, and move to get my IFR - I think the 150 is suited for that and so much more! It's been great to read that club members love to fly their planes - I expect to enjoy my purchase for a good long while..
The plane can only shoot VOR/ localizer approaches, not precision ILS approaches. I plan to upgrade later when I'm ready.. Will be a fun (though expensive!) journey.