I like the titanium line from Evernew largely because they offer a nice variety of pot sizes so you can mix and match to your own needs and still have everything nest.  They are wonderfully light weight.  The two problems with them, and I think this is true for all titanium pots, is that, because they are so thin you have to pay attention when cooking because there will be a hot spot.  The second thing is the non stick surface.  While its there its great and so far I've had no problems (only used my set for 1 season so far) but others have reported that the stuff peels and comes off which is not only a nuisance but somewhat of a health hazard as well.  That being said it is difficult to find titanium cookware that doesn't incorporate nonstick surfacing which I find annoying.