We have the Sleepypod for Ella and found that if you use all attachment points as recommended (seatbelt through the strap plus 2x isofix points), it's actually really tricky for them to lie down. The isofix straps are quite short so the only way to attach both is for the dog to face forwards.I'd probably buy the Sleepypod one if I was buying again, though, as it is slightly better performing on crash tests - the dog can also lie down wearing this one.