Tell me about an Ergo carrier

[TJA]

Does anyone have one? My twins have outgrown the bjorn carriers. We only need carriers for standing in line for rides and also for security on rides. Off topic here, but I could also use the carrier here at home so that I can run errands during the day (put one baby in the cart and the other baby in my carrier). Any experienced users of an Ergo? I did order one last night, but I'm curious to hear comments. Thanks.