You look like a bullfrog for at least a week - and it's not one of those 'oh, you'll be the only person to notice it'.  You seriously do NOT want to be seen in the week after.  

Most people probably do see some improvement 4 weeks in, but what they may not tell you is that a small number will not see any improvement at all.  I'm 8 weeks in and my before/after photos are identical.  I've been told that further treatments are unlikely to make a difference, and this happens in a very small number of people.  

Would have been good to know that before I paid the money.