I have a great performing IP in the inner north and both growth and yield have been fantastic. Yes the rental demand is insane, this time when my tenants moved out after 12 months, I had new tenants on a new 12 mth lease signed up 3 days later with the rent increasing by $40/week
This is pretty typical of the area and rents have continually followed a similar path. The property is a great one, scarce and top quality in a very central/trendy location which started to gentrify and become trendier probably 10 years ago, but has continued and still is today.
The public service automatically get the constant CPI pay rise every year and what that does is just create continued upward pressure on the entire ACT economy. The economy down there is pretty insane and stronger than anywhere else in the country, bar mining towns. There are always the fear mongers talking about a downsizing of the public service, but it never happens. If it does, they more than likely just move the same people into other/new departments anyway, so the jobs just move around.
The drawback with Canberra thesedays is that the current buy in price seems quite high compared to most other parts of the country. There are other places where properties are cheaper and you could add more value, but won't have the same upward/constant pressure and demand of Canberra.
Canberra is trickier to add your own value however, as most of the places are *reasonably* new, i.e. 1970's at the oldest. So you find it tougher to come across complete dumps that you could transform/reno etc.
I can't see Canberra going backwards at all, the place just spells growth, growth and more growth for the next 10+ years and if anything, all it will do is stagnate at the current prices for 1-2 years until the rest of the country catches back up, as its had some excellent growth in recent years. Then of course, it will start to pick up and grow some more.
I use my Canberra IP as my anchor, because it's so stable and safe, that is the backbone of my other investments. Basically nothing happened to Canberra house prices right through the entire GFC. There were still constantly plenty of people there with the money to pay the pre-GFC prices.