I received this as a Christmas gift and was so disappointed with it.
The blade is ridiculously flimsy and just won't stay straight, even with careful use. It basically just tore up the cake (and it was a firm, dense cake mix that I've used many times before with no problems). The results were so bad that I had to throw away the cake and start again. Buy a cheap wire cutter instead - it's more effort to use but the results are a million times better.