I shoot mostly food and sometimes products. Does it make sense to buy a tilt shift lens?

I bought 90mm Canon ts-e last spring. I mainly shoot food and products (as you can see from my portfolio). I use the TS-E lens about 99% of time when I'm shooting still life shots. I use the lens with Kenko extension tubes. Quality of images are very good and it gives more control to depth of field, but it takes time learn to use it correctly(means lot of rejection about "focus is not in correct place" ). I have tried to use that lens for landscapes as well, but I prefer other lenses for landscape work. There is nice article about ts-e lens in FredMiranda (http://www.fredmiranda.com/TS-E90/)

br, MjP

Check out the Hartblei range - had great review on Luminous Landscape. A bit cheaper than Canon.