I bought a 3 peice Snowpeak set at REI for 34 bucks. I have only had it about a month so the only thing I have done with it is boil water, and it did that well. I will have to test cooking with it just to see. They are VERY light. Less than 7oz for the 3 peices on my mail scale at home! So in my book, if the wieght savings keeps it in your bag instead of at home were you can't use it. Then yes Ti is worth it.
I will Report back my own cooking results, good or bad.