Are waist trainers best left in the past?

So like many of yous i see waist trainers all over my social networking and ive always been intrigued.  Getting the waist i wanted and all i had to do is wear this garment for  8 hours a day what could go wrong. when i first started wearing it i thought it was gift from the angels my body was looking amazing. i was starting to notice a different. However now im regretting it  my body seems to ache and im concerned that this waist trainer could of affected my body. Is it worth it to look good. when celebrity's like the kardashians are wearing its hard to believe these things can actually be a bad thing. So im asking you lovely people out there have yous ever tried waist trainers and do yous think these things are best left in the past or the future

waist trainer bought from www.waisttrain.uk