Not sure what you mean about the NextFit not having side impact protection? It goes to 40lbs rear-facing, and it fits in a lot of small cars rearfacing. I have one and have put it (RF) in the following cars: 99 Subaru Outback, 03 Honda Accord, 05 Subaru Impreza, 07 Infiniti g35x, 03 Ford E350 van.
It is a great seat, very easy/fast to install and switch between vehicles. Very compact front to back and has the second-highest RF slots available.
Also, given its short/compact shape, there really isn't a need to tether it rear-facing. Its so snug in there, it isn't going anywhere! :P
Mom to E(11/92), H(10/95), C(4/98), S(12/00) and M(4/13)
Last edited by farmer; 08-11-2014 at 02:51 PM.
Reason: forgot the part about the tether