This subject matter has come up from time to time, with particular emphasis on price (obviously), quality of the product and the scope and reliability of 'after supply' service by the manufacturer, namely GAHH in California.
We have conducted business with that organization for probably eight years now, and its reputation as far as quality of product is concerned is beyond reproach. Sure, from time to time and if one is super fussy, some aspects can be faulted - particularly for carpets...