No problem, even with two "latch" seats...
We have a 5 year old boy facing forward in a Recaro Start (uses factory seat belt) and a 13 month old girl facing forward in a Recaro Young Sport, using LATCH and the seat's built in 5 point harnesses.
We've gone all the way back and forth from Philly to Indianapolis in this configuration!
Dave Flogaus CCA #123862
Instructor, BMW Club Racer & Nürburgring Specialist
95 E34 M5 3.8 Daytona Violet
98 E36 M3/4 White IS #244
14 F31 M Sport Touring, 13 E70 X5d