"I've bought many Office and Windows keys from them over the past several years and NEVER had a problem. On this past order (which was quite large) NONE of the keys would activate automatically. Not one. Their reply was that I should go through many steps to activate them, but nothing worked. A significant amount of money was spent and apparently lost. I don't know if I can rely on them again."

"windows 10 pro - works great and updates."

"First, lowest price I could find. Second, almost immediate delivery via email. Third, surprisingly easy. All in all, very good experience with purchase of both Windows 10 and Microsoft Office 2019 (bought separately for 2 different PC). Provided keys worked great and the emails containing the keys also contained a detailed step by step instructions on how to get the product and how to activate."

"Fast delivery of activation key, about seven minutes from order confirmation."

"I bought a license to upgrade from Windows 10 Home Single Language to Windows 10 Professional and it didn't work for me. But I wrote to the Customer Service Center and they clarified that with a clean installation if it had to work."

"I bought a bundle win 10 + office 2019, both codes work (office must be activated by a phone). "

"Exactly as advertised. Reasonably priced. Expedient and proficient. I'd absolutely recommend. "

"I bought an Office 2016 but was not able to activate it. I got just the error the product has been already activated and additional activation is not allowed. No answer from support so far. So I don't recommend to buy anything from Keysworlds."

"I bought Windows 10 Pro+Office 2019 Pro. Everything works great. Fast and helpful customer service. Highly recommended."

"I am very satisfied with the Keysworlds.com store, they are reliable and delivery is very fast
I have used their services several times and I am satisfied"

"Perfect service, payment, speed, low cost. I got the Windows 10 Pro activation code immediately. It works just fine."

"I have purchased in the past and the software always works. Keysworlds has been around for awhile. I've purchased on Ebay and the sellers disappear. Just purchased the Windows 10 Professional and Office Pro 209. Very Happy. "

"The Windows key worked, but the MS Office keys - didn't. I'm waiting Keysworlds to find a solution for three days yet. but nothing."

"Under 5 minutes i had 2 mails the second mail was the key so i recommend...!!"

"Everything worked as described in the enclosed instructions."