Firstly, if you have the sims 3 on pc do not buy it on console, it sucks in comparison.
The main thing that annoys me with this game is that you can't free roam as easily, instead transfering from section to section. This may seem a trivial complaint, however heres the reason why it makes a huge difference. If you have more than one sim, and you take one of them away to another section, the ones in the house taake matters into their own hands. For example i cam back to find that my sim had ordered 3 pizzas... even though her to do list was packed with long tasks and i was gone for about 10 seconds, so how they arrived before i went back i don't know. to solve this i put the sims will at minimum so they don't do anything on their own. This still doesn't work as they just stop doing anything when you leave, except for get out of bed if they were sleeping... which doesn't help because they'll be in a bad mood when you go back.
The only other problem is targeting, its very hard to do anything quickly as you have to choose from 5 objects every time you click on the fridge. don't want the blender, no i don't want the microwave, or the dishwasher, hence why the target was directly over the fridge. This makes no odds to the game. This also makes putting stairs in unusually difficult, adding extension to your house and roofing is virtually out of the question if you want to build your own.
Other than this the game is excactly the same as the PC version.
The loading times are good, the graphics are good and you can still doing all of the fun stuff from the PC version, although it can be frustating doing most of it due to the above problems.
In conclusion, a reasonable port of the Sims, but would only suggest it for real sims fans, nobody else would be able to put up with the poor mechanics.