In all honesty ive tried a few now including a premium Cali cart. It just cant match bud for me the high is shorter lived and in my personal opinion the high seems to lack a level of complexity that you get from flower or hash.
For convenience and stealth in public they are excellent though.
MJc and Pope have some very well reviewed carts though that i have tried. A few of the guys on here swear by some of the US vendors for carts though