Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: If I have an existing chain drive, do I need to buy anything else beyond this package?  The belt and such are included?
Document: Chamberlain WD832KEV Ultra Quiet and Strong 1/2 HP Belt Drive Garage Door OpenerPro:1. Following the instructions, the installation is pretty straightforward. Two people required for install.2. The package comes with almost everything one will need to install. Unless your garage roof is furnished. If so, you may need two pieces of metal strips to secure it to the roof and some metal cutting tools.3. The belt driven system is a lot quieter than chain driven one it replaced.4.
This included taking a break to grill burgers and eat; and moving items in the garage (lawn mower, bikes, etc...).I was replacing two existing openers, which added to the install time. I had to uninstall the existing openers, and I didn't reuse anything, plus I had to relocate the ceiling mounts because the new openers did not align with the existing mounts.Our garage door is the main entry into our home. It's for this reason we decided to upgrade our dated openers.
No problems with installation - but as others have noted, you're going to need some help. NOT a one-person job, but then I'm not mechanically inclined. Normally, I would have paid someone, but I have a family member who knew what he was doing.This replaced a Craftsman chain drive that finally broke. So far, it's a clear improvement. Quieter, smoother, etc. But since it's replacing a broken model, anything would have been better.
I had the advantage of replacing an old Genie opener, so some of the hardware was already installed. I did not need any parts that were not included in the package. I linked it to my 2011 Subaru Outback's HomeLink button without having to call the manufacturer for the extra part. The opener is much quieter than my old one. I'm so glad I picked this one.
This is the first garage door opener I've owned, so I really can't compare it to anything else. But I can say that it was better than I expected! My garage door is 7' high by 20' wide with some kinks and dents in it, so it was a bit heavy to open manually. Installation was relatively easy following the manual... except for the belt tension spring. The opener came with a spring different from the one shown in the manual, so it had to be installed differently.
I was able to do the installation myself, only need my wife to hold the unit in place while bolting to the ceiling. The good. It is very quiet, a drastic improvement over the clanging chain drive. Love the built in motion sensor to turn on the light, the wireless keypad, the automatic closing after 1,5 or 10 minutes. The instructions were easy to follow. The addendum replaced two steps in the original installation guide and made adjusting the belt tension a breeze.
The funny thing is that it synchs on the cheaper models that are not "MyQ". On the box they make it sound like it will synchronize with anything.Also the bar is very weak (on all models) and the belt can sometimes get stuck going over the trolley which could prevent the garage door from opening.I had to take my down return to the store. Buy a Genie or any brand that is not affiliated with Chamberlain.
I had read that the Liftmaster Internet Gateway would work with the Chamberlain as they were the same so I opted to get one. It was easy to set it up so I could also run the opener from my Android phone.The first time I heard the opener operate it was pretty amazing. I had never heard a belt drive opener before and when compared anything I had heard before the difference was huge. It is so quiet that most of the sound comes from the door track.
This review covers the Chamberlin 1-800-528-9131  Model WD832KEV -  hp Ultra Quiet and Strong 1/2 HP Belt Drive Garage Door Opener.My unit arrived in fine shape but was missing the two remote openers that are both advertised on the box as "included" and the web site. I called customer service at Chamberlin and spoke to "Dave".
I've been with a manual garage for over a decade, so I was anxious to put the Chamberlain WD832KEV Ultra Quiet and Strong 1/2 HP Belt Drive Garage Door Opener on my house so my life would be easier.Installation was a bit tedious, but not horribly difficult. It would have been much easier if the instructions actually fit the device shipped and/or the parts that were included fit what the instructions say.
Answer: yes