As a "Senior Member" going on 70 now 
getting Cumulus downloaded, installed, and linked to my Vue took about 10 minutes. Playing with its settings so it reboots with the computer took another 10. Hooking it up with WU took 2 minutes, and with CWOP another 2 minutes after I found my sign in info. And for good measure I created a Weather Bug account and linked to that, even though they inform us they are not posting yet due to some sort of upgrade they are performing.
First step: Just download the program to see if you like the interface.
Yes I agree that setting up Cumulus is farily straight-forward, on the other hand I think that Weather Display is also not difficult, there are many more options and things it can do, but if you want just the basics, it does the job quite well too.
And most importantly, there is a very active and helpful forum, where many people offer help, in particular Brian (the developer) who has recently also started publishing "how to videos", which in my opinion is the best possible way of showing others how to do something. They say a picture is worth a thousand words, and video where you can see exactly where to click and how to set it up, is in this case probably worth a million words 
I've never installed Cumulus but am running both VWS and WD. WD is much more challenging to get setup initially simply due to the number of optional settings it has. Making a video or a manual is great; HOWEVER, the major issue that rears its' ugly head is the task of keeping documentation/videos up-to-date so they match the current version of software. Look at VWS, for example. The manual hasn't been touched in many years and that adds to the confusion for new users.
It seems that the documentation always lags the software releases...
True, but as far as I know, Brian does make changes quite often, but those are minor things, new features etc., but the basics have been the same for quite a long time. Videos are up-to-date.
I also see it from the developer´s point of view and one thing I love about WD is its consistency. For example, the clientraw. New things have been added to it over the years, but that is always to the end of the file - meaning field numbers remain the same. It uses always the same units, always the same date format, always the same decimal separator, data delimiter etc. From my point of view, this is ideal - as a developer you know exactly how to work with the data and how you then show it to the user is up to you, converting it is simple.
In this sense Cumulus for example uses various date delimiters, various decimal separators, various data field separators... and I was dealing with this only a few hours ago when one of the users wrote to me because their log imports did not work.
I am by no means saying Cumulus is not a good SW, but in some respects WD is much better and the videos are up-to-date and basics not changing.
