Sterla - yeah they went down well for me too! I also was eating fruit veges meat etc alongside it, so if anything we are getting more than enough nutrients & vitamins!
I had one today (before reading this) but haven't had any others for about a week.... not really needing them anymore as i'm able to eat better now.

you should be able to start feeling better soon as you enter 2nd tri....

As Astrid said, as long as it's not the 'body building protein shakes' we should be fine.