Overall I liked this one. Spot-on amazing narration to start with. Some of the innuendoes were rather over the top, which was funny at first but got a little old as the episode went on. I don't think the suicide was too much for the story--it was intended to be black comedy from the start, and we saw her dead body at the beginning so it was no sort of surprise.
Everyone seemed to think Smidgen's savior at the end was a dog, but I thought it was pretty clearly a rat. She never mentioned owning a dog, and I wouldn't think one would be able to get into her house unannounced, while mice/rats have a tendency to slip through cracks and show up uninvited, especially when there's food sitting on the floor. True, one would think that with all those other advanced technology that they would have intelligent pest control systems, but remember that this society is heavily marketing driven. Maybe they CAN make a better mouse trap, but don't want to make it TOO good--if you make a perfect mouse trap then no one will have a need to buy any more of your products. Instead the company makes them incrementally better so they can say "new and improved" and repeat hundreds of times, always adding a little more appeal to draw customers.
I tend to agree with eytanz that the marketing here is implausible, making the purchase a big decision, unless these are very expensive snack cakes, which I don't think they were intended to be. The health food manufacturers would do better to make their AIs a little more charming like smidgen. I kind of wanted to throw them down the disposal too, they were like a bunch of bubbly vegetary cheerleaders.
One thing that I really dug about the story is that it didn't fall under the trope of AI-gains-feelings. Smidgen's feelings were programmed in as motivation to perform certain behaviors. He desires to be eaten, so he does everything he can to reach this goal and even though this feeling is intentionally programmed in, it's no more artificial than my own emotions which derive from incomprehensible mixes of brain chemistry. And Smidgen's designers really thought out the emotions too. "Should we make it capable of grief?" "Nah, what good would that do? If its buyer died, it'd sit around and mope until it got moldy. Let's have it transfer its affection to someone else." So instead of a robot gaining the ability to feel, it has only selective feelings in-programmed and is both unaware of its lack of guilt and sadness and completely unconcerned by this lack.