Can't handle HiDPI displays, so the plugin window is ultra-tiny. And then its entire reason for being - price tracking - doesn't work. Click the heart on a product like it says to track a product, and the plugin will say you're not tracking any products. Error/status messages are in unhelpful broken english throughout. And, as other reviews have pointed out, they're skimming off the top of whatever you buy by inserting their own tracking codes. With a name like "BigData Technologies" I guess that tells you all you need to know. Avoid.