Pretty good since it tastes like Ginger Ale.  We made a second that was much better; here's our recipe:

Fill a tall glass with ice, add 1.5oz Pimm's No. 1.  Then squeeze 1/4 lemon and 1/4 lime into the glass.  Top with tonic and stir.  Then garnish with a lemon slice, cucumber spear, slice of green apple or all three.

Photo

Sent from my iPhone