The tamron 18-270mm has an average review score of 76.5%

Score (%):
Tamron 18-270mm f/3.5-6.3 DI-II (IF) LD VC Macro Aspherical lens review
How far does the the flagship Tamron 18-270mm f/3.5-6.3 DI-II (IF) LD VC Macro Aspherical lens build on the promise of the earlier 18-250mm model, and does it make the extra £100 a worthwhile...
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90

Tamron 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro AF (Tested)
Multiple user reviews on slrgear.com
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83

Tamron 18-270mm Di II VC
This Tamron 18-270mm is a digital-only lens, which means its designed specifically for DSLRs with APS-C sized sensors and can’t be used on full-frame SLRs or older film cameras. Its equivalent focal range is 18-419mm, so it can replace the camera’s standard kit lens and a super-telephoto too, which makes it an extremely attractive proposition because it can effectively replace two to three separate lenses. At longer focal lengths, camera movement becomes a problem, and to counter th...
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80

Tamron AF 18-270mm f/3.5-6.3 Di II LD [IF] Asph. VC macro - Review / Test Report
The full in-depth review from photozone.de
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53