Had my 2009 2.0jtdm (170) remapped by angel tuning in the summer (sept '12 ish) after 2 months of ownership.
Angel mapped it and got 215hp and I have to say I've been very impressed with it ever since. Have done approx 12k miles since having the map and have noticed no problems (with the map, clutch, gearbox, turbo etc), the car pulls extremely well from 2k revs all the way through to 4.5k, feels much sharper and more responsive in all gears.
Regarding fuel economy, I have noticed an improvement, obviously depending on how I drive lol, but on a decent motorway run, I am achieving an addition 2 - 3 mpg's (fill to fill).
Definitely recommend having it done, and was very happy with the service & map supplied by Angel Tuning (though I'm sure there are many other companies which could supply something similar).