Ancestry
Where
http://ancestry.com.au or .com or .co.uk or .co.ca ….
Main benefits
Can attach to your ancestry DNA test for tree hints
Can collaborate with others if invited
Can easily get whole tree to your computer, attached images and all using FamilyTreeMaker (FTM), or less completely, via gedcom
Coming (before end of 2016) integration with RootsMagic
Main pitfalls
“silo” tree
FTM synchronisation is all or nothing unless you remember to mark certain people as private, ie cannot just publish one branch, or only selections from your tree without creating subset trees
Recommendations
Check your settings and chose a privacy level you are comfortable with
Before subscribing check the other country sites to check which has the best deal for your exchange rate.