Great Things:
1. South Dennis is close to some of the best beaches in Massachusetts, like Craigville Beach and Mayflower Beach.
2. South Dennis is in close proximity to a number of local attractions, including the Cape Cod National Seashore, the Cape Cod Museum of Natural History, and the Cape Cod Rail Trail.

Bad Thing:
South Dennis is prone to heavy tourism during the summer months, leading to traffic congestion and overcrowding on the beaches.

Here are some possible advantages and disadvantages of buying property in South Dennis, Massachusetts:

Advantages:
- Location: South Dennis is situated on Cape Cod, which is a popular tourist destination known for its beautiful beaches, natural scenery, and attractions such as the Cape Cod Rail Trail and the Cape Cod National Seashore. This can make South Dennis a desirable location for vacation or second homes, as well as potential rental income.
- Small town charm: South Dennis has a population of around 3,500 people and is known for its quaint downtown, historic landmarks, and community events. This can offer a sense of peace and quiet, as well as a cozy atmosphere for those who prefer a slower pace of life or a tight-knit community.
- Amenities: South Dennis has a range of amenities such as grocery stores, restaurants, coffee shops, banks, and healthcare services, with more options available in nearby towns. This can provide convenience and accessibility for everyday needs.

Disadvantages:
- Cost of living: Cape Cod is not known for being an affordable place to live or vacation, with high housing prices, property taxes, and general expenses in comparison to other parts of Massachusetts or the Northeast. This can make buying property in South Dennis a significant financial commitment, especially for those on a tight budget.
- Seasonal fluctuations: South Dennis and Cape Cod as a whole are heavily dependent on tourism, which means that the economy and housing market can be subject to fluctuations in demand and pricing depending on the season. This can affect rental income, property value, and the availability of certain services or amenities.
- Weather and traffic: Although Cape Cod is known for its natural beauty and mild climate, it can also experience extreme weather events such as hurricanes, nor'easters, and coastal flooding. Additionally, traffic and congestion can be a problem during peak tourist season, which can affect commute times and quality of life.

Please keep in mind that these points are just generalizations and may not apply to everyone's preferences or circumstances. It's important to do more research and consult with local experts such as realtors, attorneys, and financial advisors before making any major real estate or financial decisions.