I did use Logmein for a few years; but prefer TeamViewer, without trying any others.
With TeamViewer, you can organise the two or more PCs in to a group, so that as long as the remote device is switched on and TV running, you can log-in without having to phone/Skype your mother.
I have used it across 5 PCs running various versions of Windows; and also another running Ubuntu Linux, the latter having some slight restrictions.
I have not used it to/from any others such as Mac etc.
It has three distinct modes of working, of which I generally use VPN.
More remotely, I have used it to access my son's PC about 500 miles away, using the temporary form, set up using e-mail; and requiring additional passwords, ie his PC is not part of my local group, although I get automatic notification of when he starts up his PC!
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I also find it particularly useful to effectively enlarge the screen of my ASUS Netbook, if I want to do some thing finicky on that, hence avoiding having to find VGA cables and the like.
Edited by deleted (Tue 08-Sep-15 15:24:36)