I've used MANY...and it depends on what INSIDE (ingredients). Some low end products can be fine if the ingrediants are pure and safe. Some high ends can be well.....not so good if the ingrediants are harmful. So girls, look at the ingrediants and/or be sure to ask an Aesthetician or Derm to look at ingrediants for you....they know what to look for (all those high tech scientific names and such). Heck, if you don't know what something is, I say find out, or stay away from it.
On that note, I'm a middle class price range product user. My regimen may cost a bit upfront, but it lasts for 4-6 months (so I just divide that cost out monthly). Plus my opinion, if its safe and good for my skin, I'm ok spending a little extra for it.