In my opinion the Cloud based version is a Very Bad idea.
If you want to Edit, have Access, to All your images from 2 different computers then what you need to do is put all your images on an External drive and also place the catalog file on that same external drive.
You can then Open that catalog on either computer and have total access to all your images. This works best when you are using the same Kind of computer (Each computer is using the same operating system) and the external drive is getting the same exact Drive letter, or has the same Drive Name for Mac's, on each computer.
Sorry I did not read @Rob_Cullen reply but I, being a long time user of the Traditional version of Lr, would not even think about switching to the Cloud based version.
It is something completely new and does not retain certain options as far as editing that are included in the traditional version and I have no idea if it even uses a Catalog file and or if older versions of Lr (traditional versions) catalog can be imported, Used in any way, with the Cloud Based version.
I willl not throw away all the work I have done in the REAL Lr over the last 14 years.
I have the mobile version on my phone. I use it to Upload images I take with my phone to the Web system and then down to my computer and LrC. But those are few and infrequent (I use my Cell/Smart phone as a PHONE with some added features and options if I need them).
I also use it to show people some of my images that I have synced to the Web/Mobile system form LrC.
I do not sync all my images as I have no need to have all of them accessible on my phone.
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