Ancestry

With site specific servers nearest to you, eg .com.au or .co.uk or .co.ca etc.

Main benefits:

Creating and maintaining a tree is free, although data access, eg to attach sources from the Ancestry collection needs a subcription.

Can attach to your ancestry DNA test for ThruLine hints

Can collaborate with others if invited

Can easily get whole tree to your computer, attached images and all by using FamilyTreeMaker (FTM), or RootsMagic, or less completely, via gedcom

Main pitfalls:

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 separatet trees

Recommendations

Check your settings and chose a tree privacy level you are comfortable with

Before subscribing for data access do check the other country sites to check which has the best deal for your exchange rate.