This product is well made, well thought out and is ideal for my Jack Russell (any breed larger than a small, short legged Jack Russell would need the next size up). It sits perfectly in the car and is secured by a seat belt making it safe and fixed into position. The various "windows are fantastic for access and are easy to use. The addition of pockets is a great idea for poo bags and treats. I am so pleased with the crate I am about to order a large one for my Springador. I am a dog trainer and have read some bad reviews on here about these portable crates - my response to these reviews would be that it is not the product that is at fault. Dogs need to be taught that these crates are a place of safety and calm. If your dog is frantically trying to escape and scratching at the zips and doors, then the dog is clearly not happy in this sort of confined space and more training is needed. Also if your dog is likely to do this but must be crated, consider a sturdier construction such as the metal crates you can buy.