Good both sides, double sided, or no rail fence panels are all names we give to panels that look the same on both sides. Most commonly, you will have to have a rail or two to strengthen the fence panels and to attach pales to. With doubled sided fence panels the rails are concealed within the panel allowing the same design on both sides.
Double sided panel range
Benefits of a double sided fence panel
Better security - with no rails to be used as climbing aids, burglars will find it harder to scale your fence.
Both you and your neighbour get the 'good side' of the fence
More strength - often double sided panels combine two panels together which can give the strength of two panels
Easier installation - doesn't matter what side goes which way as they are both the same