Is Tamron B018 18 - 200 mm F/3.5 - 6.3 Di II VC a good buy for Nikon D5200?

I own Nikon D5200 with 18-55mm kit lens and wants to buy my first telephoto lens. I'm much into travelling and trekking and like to do Bird, Wildlife and Landscape photography. I want a versatile lens that will be low on weight as well as cost; good on image quality and atleast the zoom of 200mm.
Will the Tamron 18-200mm with VC a worthy buy? I like the quality of images produced by my kit lens so how is the quality of Tamron 18-200 wrt the kit lens 18-55? If the quality is same as the kit lens I'm happy to live with such quality! I know this lens (Tamron 18-200) wont match anyway to the pro lenses which cost 3 to 4 times for same focal length, but I'm tight on budget and don't want to spend more, but also want a versatile lens with good quality output if not exceptional. Please suggest alternatives if any.
Thanks in advance!

I was looking for a lens with similar zoom range and qualities that you are. After reading numerous reviews, I went with the Sigma 18-250mm f3.5-6.3 DC Macro OS.

I am not sure how it compares to the Tamron, but it is another option to consider.

Good luck with your decision.