I have a 4 and a 6 year old and since they are both over 45lbs. I cannot use the latches to install their car seats and have to use the seat belts instead. It is quite a chore to have to install car seats so I was very excited when I found these ones http://www.amazon.com/Britax-Frontier-Clicktight-Harness-2-Booster-Kaleidoscope/dp/B00OTXUNYW?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage They are a breeze to install with the seat belt method and keep the car seat extra secure. After taking delivery of our White MX on April I installed both seats in the second row's outer seats. It was awesome to see how easy it was to access the 3rd row with the car seats in the second row, no problem at all. The seats would move and tilt forward effortlessly, it made for quite a sales pitch when showing it to other parents with fancy SUV's that wouldn't allow them to access the third row seat without having to remove the car seats from the second row. Everything was bliss until we got our first update. After that, the seats won't move AT ALL if the seats are installed. The buttons that move the seats are rendered useless as soon as the car seat is installed which means we cannot even force the seats to move to allow access to the 3rd row. That was with version 2.17.95. Last night (05/27) we received an update which added the flexibility to make the second row seats move from the screen and it even states that by pressing the screen button and holding one can make the seat move as desired in the case of child seats in the seat. However, that still doesn't work for our setup. If we unbuckle the car seat the seat moves properly, if we remove the car seat and buckle the belt (with the seat now empty) the seat moves. However, when you buckle the seat and secure it, it seems that the combination of buckle and weight is what renders the seat unmovable. I understand that it is a safety issue to allow the seat to move while the seat is occupied and it may be hard to discern whether the occupant of the seat is an object or a real person. However, there should be a way of letting the user determine whether the seat should be allowed to move or not. The way things are right now, we have to get creative with the car seat setup when having visitors. It is an inconvenience and if, by any chance, I needed to carry around extra people on a short notice it would be a hassle to have to be rearraging car seats on the fly. Needless to say the ease of access to the third row while car seats are installed is one of the main features that make the car parent-of-small-kids friendly (that was even demonstrated at the reveal) so it is quite frustrating not to have that functionality. I'd love to know if people with the kids that have the car seats installed with the seat belts are having the same problem. I brought it up to the SC and they told me the foreman had raised the issue to the engineers but I'm still waiting for a response/fix and I had high hopes for the latest update. I'm hoping that if there's many people having this issue we'll make enough noise that they'll pay attention. I'll talk to the SC again but would love to hear from owners that are in the same situation. Thanks!