Earlier in April my family were the lucky recipients of a Suswot wormery. It was easy to assemble (with a little help from my toddler) and we positioned it in a protected corner of our garden. We send the postcard to receive our worms, which arrived through the post a few day later, much to the amusement of my 4 year old! We followed the instructions carefully and only added small amounts of kitchen waste initially to allow the worms to settle in, grow and get their speed on!
I have also got one of the SusWoT wormeries. I have the multilevel type. Seems to be going OK after I assembled it. Like you I am only adding food scraps slowly. But at least there are some worms living in it still.
Alex