I've never cleaned my sensor before and have a full frame Nikon D600. Having watched a number of videos on Youtube some said you should just use the swabs and fluid, others recommended using a magnifier as well. I plumped for the latter. This magnifier makes it so easy to see both dust and any smears you leave with the fluid, which I don't think can be done easily using the take a photo method.
The magnifier can also be used for lots of other purposes. I'm used to using a hand lens (former geologist), but the inbuilt lighting makes it so much more effective. I'm so glad I purchased this product and will not be keeping it just for the occasional sensor clean.