To Groupon or not?

Profgooglit

I am signed up to the above and get regular mail shots, some excellent bargains to be had, or are they?

10, 15, 50% off! seems a bargain! but is it, if not tempted in the first place, I've bought numerous "bargains" but in hindsight did I really need them? Lol. 

Do you Groupon? What do you think.

Allan.