Most of the answers have focused on the advantages of a written constitution, and clear disadvantages of an oral/unwritten one. However, the seeds of the disadvantages to a written constitution are also there. For example, it can concentrate greater power in the judicial branch that interprets it, rather than the legislature, which gets to daily decide what the constitution is when it is essentially unwritten.
Time Commitment. A treadmill can help you lose weight and tone all areas of your body, as long as you spend enough time on it. Depending on how rigorous your workout is, plan to spend between one and a half and three hours a week walking, jogging, or running.
The convenience of a treadmill with an incline setting will allow you to workout indoors regardless of weather conditions such as extreme heat, cold or rain. Also, many treadmill machines work in conjunction with heart rate monitors which will allow you to gauge if you are working within your target heart rate zone.