The right decision for me

I bought a year ago, a Canon 600D and am since enthusiastic hobby photographer. I bought the 600D in the kit with the 18-55mm and 55-250mm lens and the these 2 lenses are in my opinion, very good, just made me change the current lens very disturbed. When I was once again at an airshow I naturally first the telephoto lens used and had some time satisfied, only then I wanted to photograph the aircraft standing by a demonstration and had intended to have a wide-angle look. So I had to change the lens. Unfortunately, there was also very dusty and my sensor has been totally Dusty after 3 switch. Although I have tried as much as possible to protect my camera from dust when changing it was a lost battle ...

This experience had 2 effects on me.
1. Now I can clean my sensor
2. I have decided for a super zoom / buying Definitively travel lens.

After 2 weeks, I have reduced my choices to 3 lenses.
1. Canon 18-200mm IS lens Canon around here it is in recession.
2. Tamron 18-270mm Di II VC PZD
3. Sigma 18-250mm DC OS HSM

After another 2 weeks, Internet research, I have finally decided on the Canon lens. It was ultimately a few reasons why I have decided for the Canon and not the Tamron or Sigma but I was ultimately so chose Canon because it is the same manufacturer and I on a test page (I do not remember, unfortunately, what page it was) Compare Photos've seen from all 3 lenses and my image have occurred most sharply.

Meanwhile I use the lens already for half a year and am almost completely satisfied.
+ It makes good pictures, the quality is very good and with Lightroom you can resolve the known issues as Barreldistortion with one click.
+ I think that the focus is very accurately and quickly.
+ The weight of the camera with this lens I find very pleasant.
+ The image stabilization works well. I have used the lens in Venice and can make some very sharp images in very bad aspect ratios.

However, there is also a point of not really like me but since I have known about it and bought it to know with whom I benote this is not negative. One should know before buying it though.
- The zoom is by no means 200mm but rather listening to at 175-180mm. From 170mm doing at the zoom so virtually nothing more.

I am 100% satisfied with this lens (at least in combination with my 600D) and it would buy me immediately. Therefore, there is of me 5 of 5 points.

I hope to have you helped with this review and I would be glad if you click on this review to "YES". If there should still be questions, of course, I am happy at your disposal and will try it as soon as possible to answer me.