Not all eyelash extensions are the same.  Be careful about cheap eyelash extensions, you may be dissapointed with the results.  Here's an example:

Cheap $30 eyelash extensions

We had a client come in recently not sure her cheap $30 eyelash extensions were supposed to look like they did.  We confirmed that they were poorly done and removed them, replacing them with a new set of eyelash extensions - see the before and after pictures below.

Eyelash Extensions from The Beauty Lounge.  An extra $70 goes a long way.

We removed the "broomsticks" above and replaced them with a set of high quality, professionally applied eyelash extensions.