I can speak as a franchisor that has been involved in franchising for several years including a domestic cleaning franchise (called One Less Thing).
There are certainly good and "less good" franchise opportunities, and not all franchises will be right for everyone. It's about looking for something that suits your investment level, skills, interests and - crucially - what you'd like to spend your time doing every day.
When people think of franchises they often think of McDonalds, but there are some excellent franchisees which can be started with a much lower investment and can provide great returns, and can also be run from home.
I love small business, and so franchising is appealing because I get to help people start and run a small business.
I find there's no greater feeling than seeing a franchisee take the system that we have created, then add their drive and commitment and make it thrive. It can be truly lifechanging for the franchisee - financially but also in terms of their quality of life too.
There are rules that you need to stick to, of course. These are not just to protect the franchisor, but also each franchisee and the franchise network as a whole. For example they can prevent rogue franchisees from damaging the brand or deviating too far from the proven system.
Any legitimate franchise will have a large legal franchise agreement which you need to sign - but this is there to protect both parties and make clear who's responsible for what. The British Franchise Association has ethical guidelines for franchising and the franchise agreement should meet these to make sure it's fair.
I sometime hear people question why it's necessary to pay for a franchise when you could do it yourself 'for free'. For a well-run franchise there is no comparison as the benefit of the training, brand, support and economies of scale that can come with a good franchise should easily outweigh the cost. Some of these elements will be calculations that you can do (i.e. it would cost me more to do this if I did it myself) and others are softer and only become apparent when running the business; like having a support network of the franchisor and other franchisees, and continual developing and improvements to the business.
In my experience, the most successful franchisees are ones that focus on what they can add to the brand, system and resources that the franchise provides. Combining a great brand and proven system with your own determination, skills and drive can be a very powerful combination.
I hope this helps. And good luck with whatever you decide to do.