Make sure the landlord is reputable and remember that the shorter the lease, the quicker your home will shrink in value. The other key issue is the property's running costs. These can vary dramatically depending on location. Check whether the council tax and water rates are unexpectedly high, for example, and whether the property has access to mains gas and electricity supplies. At the same time, check whether the building is connected to cable or phone lines.
Location is a major factor in the property's attractiveness.
Apart from obvious considerations like the journey time to work, distance from family and friends, transport links and the general desirability of the neighbourhood, assess the surrounding amenities. It is wise to view the property several times to get an idea of what the area is like during rush hour or shortly before pub closing time. If you have children, look at the local playgroup or school and if necessary check its position in the Department of Education's league table. If going out is important, cast an eye over the nearby restaurants, cinemas, nightclubs and sports centres. You might want to take parks and play areas into account.