I downloaded and installed Leawo Video Converter in Sandoxie from the link on their homepage. (http://file2.fomore.com/download/leawo_com/videoconverter_setup.exe) and used a disposable email address to register.
The installer did not include any additional adware, it did suggest to install K-Lite Codec Pack to help with converting, so I installed it as well.
I got the registration code and it registered without a problem.
I checked all files in Sanboxie and there was nothing at all malicious.
Maybe in the past they included malware in their installers but this installer was 100% clean.
I did not test the product to see how it performs but I didn't read several reviews on Cnet and other download sites and most were not so good.
Some reviews say after the users bought their products the registration codes that they received would not register it. Other reviews said their products claimed to be free on download sites but only gave them a free trial. A few more said that the company had poor support or their support was non-existent and they refused to issue refunds or send them a registration codes that would work.
So I believe the main reason for the bad reputation on WOT is because of the companies ethics. They are known to go into forums and spam, I would want them to have my real email address because if they will spam forums, then they might also give my email out to other spammers or just spam my email with their adverts. I most certainly wouldn't buy products from them.
Enjoy!!