So changing my review of the mountain buggy.I don't recommend it and am returning it.It's dangerous and was the only stress of my trip.My trip would have been fine and low stress without this stroller.This stroller is impossible to fold and unfold. Like super difficult.I had to unfold it off the shuttle to get myself and luggage in the airport. That took 15 min.Got myself sorted.Then had to fold it and put everything on the belt for TSA pre check. The guy was going to help me because i couldn't get the dang thing folded but i thought he might break it because it's not easy.Thankfully nobody waiting behind.Then unfold it again after security.I packed very minimal had my 2 laptops in diaper bag with pump and stuff and just a small personal item and it was still a lot.Then i knew was going to take me awhile to fold it again and get situated and put her in the carrier on me to get on the plane.This is where the danger comes in.I took everything off the stroller. Baby was in car seat. I put her in the stroller with nothing on it and turned to put the car seat in the bag.The stroller tipped all the way backwards so the adult push handlebars were on the ground she slid backwards and hit her head and was injured.She was upset i was upset and i almost was going to take her to the ER.She had a mesh imprint on her head instantly which was also weird.I was literally right there and i don't understand how it tipped. Also she's only 15 lbs/7kg so i don't know if it's just because she's so little?Anyways I'm scared to use it and am returning it.I don't recommend it now due to the danger of tipping especially with little babies.I'm a nurse practitioner and do not recommend this product due to safety concerns.I am going to post a review on these two travel strollers.I am going to keep the Mountain buggy nano. I had considered keeping both but they are similar and don't need both.The 3D pac CS+ would be a great small stroller for the car and around the city, as it's much easier to open/close and still compact.Mountain buggy nano $219Summer 3D Pac cs+ $111(I didn't read instructions yet for either)Summary these are both great strollers.If you want an "easier" stroller, good price and don't mind that it can't lie flat I recommend the 3D Pac CS+. For a lower budget and older child this would be perfectly adequate.For travel I think the Mountain buggy is a better option with more pros and compactness even though it will take some getting used to. This is also the better option for a baby with it's complete lie flat option and bassinet/car seat options.You can see from the pics the under basket is about the same on both.Both are small.It would be nice if they had a backpack feature to make them easier to carry.Both can have infant baby facing you.MB:ProsLighter, rolls smoother/easier also seems to turn smoother,Seat lays completely flatBig CanopyI have a Graco click and go and you can strap it in and seems very secure.You can attach a bag/cup holderComes with a bagFolds flatterSeems small enough to take on the plane and fit above. Possibly under seat but not sure.More compact.If you look at the picture a really cool thing is you can put your bag AND car seat in the SEAT portion. And still have room underneath in the basket.Cons:More expensiveNo front handlebar/tray for kidNo bag or cup/phone holdersFor me it was difficult to figure out how to unfold it and get it set up. It will take practice for me to get it straight. I had to watch a youtube video multiple times, and then had to find another youtube video because I still couldn't figure out how to open or fold the dang thing.Not simple.You REALLY have to watch a few youtube videos to figure out how to work it all out. There are extra straps hidden under the seat. Never would have figured out where those were, I thought they were missing. Also I still don't know where to attach the mesh panel that is in the front of the basket below the seat.3DPac CS+Easy to unbox and put together without reading any instructions.Much easier to unbox. No instructions/videos needed.Easy to unfold, and fold similar to my graco stroller.Has a strap to use as a carrying strap.There is a small attached bag near the parent's handlebar.There are 2 plastic things that attach to hold a drink/phone.If you are taller this one has a taller handlebar.Has a handlebar for child. So you could attach a tray etc to this.This handlebar is easy to attach and remove.Big canopyWorks with graco click car seat.Looks a little prettier and the grey is nicer.Might be slightly more cushy.Cons:You can see from the pictures a little biggerNo bag/caseThere are 2 plastic things that attach to hold a drink/phone.-- These are cheaply made and fall off easily.Car seat doesn't feel as securely attached.