Being more than just a Ren'Py port, this game starts as remake of the original BB. The story premisse is the same, but after a while the two games start to drift apart. The general direction is the same: Family comes to a house, Max tries to get into everyones pants, Eric threatens that. But the single events have been changed a lot, some have been removed and quite a few have been added or extended already. Some were revamped completely (Lisa's schoolmate/Olivia/horror movie opportunity for example) The general process feels a lot more natural, some opportunities are interconnected (best example: getting close to Alice requires progress in several opportunities), so you can't progress on one far more than on others with the same theme. Compared to the original, this game adds a lot more flavour, the scenes are shown from different angles, have multiple outcomes. Most of all you can see the diversity on the daily scenes, the girls pose or dress differently, so it does not feel all that repetitive. Also there are some new game mechanics like the use of the cameras to trigger certain events.
All in all it's a good remake so far, we'll see how it goes from here. At least one side character was removed from the game, a new one was introduced instead, more were promised.
What you can't expect from this game: It's not one of thoese VNs, which you start, click a few times and then get into bed with mom ... err ... the landlady. The advancement is rather slow, it's more about getting close to the other inhabitants (and of course spy on them, Max is a pervert), rather than a collection of lewd scenes. So the "when mom sex" question will be answered with "soon™" for quite some time.