I think these also look very good, I just don't know what people are complaining about regarding this lens.
I also have the lens and overall I like it a lot, however there are some shortcomings. Shooting indoor is one of them.
Indoor (½ dark):
18mm - canon 50D @ 12800 ISO (ouch the noise... Getting a 50mm f.1.8 II soon - cheap and nice i hear).
But the 18-200mm its great outdoors!
But it does tend to bend images a bit
20mm look at the bend on that nearest flagpole!
Overall I love the lens. It's simply perfect for taking a walk through the city and shooting.
Naturally it might not be an "L" lens and the long range comes does mean its not really a high performer at the end of the ranges, but for me personally, the challenge lies not in the glass but in finding the motives and taking pictures of random people - closer than 200mm