The risk in film relief is that the film is not produced in accordance with revenue rules and you lose the relief. This can be negated by making sure the film you invest in is made by a production company with a history of completing section 481 films. Also look for one that is presold. I have done several over the last few years and the company I dealt with have completed 39 of these to date with no issues for the investor.
To my mind they are as close to a 'no brainer' as it gets. No cash outlay is needed and at the minimum entry level a return of circa €850 is achieved with up to €3500 for those with more income to shelter. Minimum amount of income you need to be paying higher rate tax on is €12,500 up to max of €50,000.
One of the few reliefs the govt has committed to going forward