Got this for my dachshund/jack russel mix (she is going to be about 7 Kg, so I could have gone for the small dogs, but I was not sure at the time). I bought this leash due to the accessories and the length. I had 5 mts and it was too short (came with the puppy), so I decided to upgrade the whole way and I don't regret a thing! I had no problem with the delivery (and I live in Finland). the product won me over and I am now recommend it to everyone. the felxi as such has no mayor difference, but the accessories: I have the box for the bags, the led light leash, the flexible cord (waiting for summer to try it) and the lamp and is so comfortable. Also there is a huge difference between my husbands' hand and mine, and with the adjustable handle it makes it so easy to grab. Takes this as an investment (I don't think you will have to buy more than 1 leash on your dogs life) so make it count!