Exenatide or Byetta

Forgive me for diving straight in to the group, but I have a question
which somone on alt.sup****t.diabetes.uk suggested could better be
answered here.

I'm an obese arthritic 64 year old Type 2 diabetic with heart failure
and find it extremely difficult to manage my blood glucose, since it's
virtually impossible for me to take proper exercise, owing to the knees
and the breathlessness.

My diabetician has now suggested that I should try Exenatide (Byetta) on
the grounds that it would control my blood glucose and also help me lose
weight.  Losing weight would be great for the heart failure and the
wonky knees!  The diabetic nurse says that common side effects are
nausea and vomiting, which I don't much fancy, and that this can last up
to a fortnight.

I've Scroogled for it and find that some people also experience
pancreatitis.

Does anyone have any experience of taking this stuff either themselves,
or among friends and family?  I'd be really grateful for anyone's
experiences with this before I make up my mind.