Brucea, Accuracy depends on the pistol. The super is as accurate as any other cartridge. What you may be thinking of was that when the super was first developed it had serious problems with accuracy because they tried to headspace on the rim. When they changed over, years ago, to headspacing on the case mouth, accuracy problems went away. I've reloaded .38 super for 10 years now, no more problems than any other cartridge. I have a .38 super Colt Commander and I love it. The super is shot regularly in IPSC in raceguns. Get one, you'll be happy with it. You may have some problems finding commercial ammo though.
There is a good writeup on the Super .38 in Nov. 2001 issue of Shooting Sports USA (a publication of the NRA). The article is titled "Evolution of the Super .38 Action Shooters Best Kept Secret". The article is really positive on this cartridge, enough so that I might pick one up.