Is manuka honey as good as professional claim and what can it be used for?

Not professional: It is touted to have high anti-oxidant and anti-bacterial activities. The medical grade is likely helpful when used topically on wounds to control or prevent infection. However I am highly doubtful that it can be used to prevent cancer, control diabetes, or treat a systemic infection. Anything that sounds too good is too good to be true. Like the acai craze, this too shall pass.