Since the Tap`s do without battery and draw their energy from the keystroke, it is strong to push at first a bit strange in the era of touch screens and voice commands again a button. But you get used to it very quickly and it works! We now have 2 Tap`s in use, because it has been shown that with the Tap`s the light but faster time arrival, or can switch off as if only the APP calls since.
Conclusion: practical addition, unfortunately (as the whole Hue system) do not come cheap, though it's pretty blatant that here require some sellers almost twice the regular price of about 59 EUR ...