I've been using my Philips Sonicare toothbrush with the regular toothbrush heads/attachments for a while now and have always been very satisfied.
Due to my pregnancy, my gums became more sensitive, so I tried these softer attachments.
The brushes are packaged entirely in cardboard, which I definitely consider a plus.
Each brush comes with a plastic protective case, which I always use. I write down the owner's name on the case, as unfortunately, Sonicare brushes don't allow you to personalize them so you know which brush belongs to which.
Using them is easy, but I did have to get used to this brush: the soft bristles wear out faster if you press too hard (and if you're used to the harder bristles, you tend to press too hard with this one).
The toothbrush doesn't give a warning quickly enough, which is a minor drawback.
Despite that, I'm definitely happy with my purchase: the brush heads are noticeably gentler on my gums, and I no longer experience bleeding. So I would definitely recommend these to anyone for whom the regular Sonicare brush heads are too hard.