Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good for a week then sent a surge into my Rebel blowing the Hot shoe...

I bought this not expecting too much but guessed it would be of some use. The first day Iused it I was happy but the second day after taking 25-30 shots I heard a BIG POP, then itwas dead. I called 47th Street and they agreed to credit me. Today I connected myCanon 420 flash to the same camera and sadly found my Hot Shoe is blown out. The Opteaksent a surge when the capacitor jumped into my $800 Canon Rebel. I knew I was taking a chancebuying a cheap Macro Ring Flash but NEVER could have guessed this might happen. I'm justsorry no one reported such a problem in the reviews I read, I'm doing this as a warning onlyto pass on my very sad experience with this product, spend the extra for the Sigma EM-140DG.