Britax 2016 B-Agile/B- Safe 35 Travel System

Mr
Honest reviews? 
I've read a lot online that some people find it hard to push but others have said different.  Searching for some honest feedback on this travel system :)
I'm also looking into the Nuna Mixx which I would go for in a heartbeat but the price is what's stopping me. As well as the Mamas and Papas Sola2 which isn't as expensive as the Nuna but I haven't seen that many reviews.