We ordered two of the small size beds, and they are big enough for our Jack Russell terrier and rat terrier.  We had previously had medium size beds and we're hoping we could use the small size because the medium were somewhat difficult to fit in our top load washing machine.  The dogs are liking this size just as well.  The luxury version has a significantly nicer cover than the regular version.  We received our previous beds from another store and they were a lot more expensive for the same product - very happy with the value of these and same good quality.  We had the previous beds with thinner cover for about 8 years and washed frequently.  They are pretty sturdy but do shed the shearling inside a bit due to our dogs being vigorous diggers inside them prior to curling up.  Overall great product!