My 2009 edition worked like a dream when he was fresh out of the box. Maximum cuteness output, no trouble at all with the feeding input, and recharged for a solid 12hrs a night after just six weeks of use.
We were so pleased that we decided to get a second one and went for the 2011 girl edition. Initial set-up was a bit of a hassle, she was stuck in the packaging and had to be cut out but after that she was a dream and we had the same maximum cuteness output and fantastic recharge time that we'd come to expect.
She was so easy to run that we thought we'd round off the set with one more, the 2014 boy edition. Well. I don't know if standards at the factory had dropped or if we got one of the hidden camera show models but Jesus fucking Christ. He didn't recharge for longer than 3-4 hours at a time until he was almost three years old and some nights he wouldn't recharge at all yet his overall energy levels never once dropped. He came with software traits we'd never seen before like Stubbornness 1.0 and High Demands 2.0, we very quickly learned that upsetting the balance of either of these functions would activate the (not-mentioned-in-the-adverts) Scream Until Sick protocol. He messed with the settings on our 2009 and 2011 models by installing the "He Touched My Stuff" and "He Bit Me" whine patterns which made me install a wine pattern in my own programming.
Just as we were getting a handle on all of that through the use of strict Boundary and Consequence parameters, the factory announced they were sending us a surprise 2017 girl model.
This latest model so far appears to embody the best and worst of the previous models. Maximum cuteness and great recharge capability but only in my bed as she appears to be totally incompatible with the Cot accessory even though the salesperson at John Lewis assured us it was suitable for this particular model. She is stubborn at levels not previously seen and her Scream function hasn't been fitted with a volume limiter or a timer, no Bite drive thankfully but Slap function seems to be spring loaded and 90% of the time she is stuck on Unreasonable Tantrum mode.
None of the models seem to be able to operate on the same network without it initiating their Irritate The Shit Out of Each Other programmes. We got the Trampoline bolt-on pack to give them something to occupy them outside but this made the Arguing functions worse as they became pre-occupied with who's turn it was and who was using up all the jumps, it also attracted units from all the nearby houses and before I knew it I had half the street in my garden. As the models have gotten older they've also started siphoning off more and more money from my bank account as well as food from the kitchen. 2009 model has started showing signs of the pre-teen Shitty Attitude update and today is headed for a firm Re-boot In The Backside.