To serve, I peeled the cuke, then cut it in half, then into quarters. The cucumber was a good consistency for Buttercup to hold on to while gumming it, though a bit slippery. It didn't fall apart, which can happen with a lot of her foods.
I found the whole experience to be very similar to her first try with melon: it seemed like she wasn't getting much fruit off, but she enjoyed the chewing process. This one might be better with a few teeth.
PROS: doesn't fall apart
CONS: hard to chew with no teeth