Their customer service has gotten just downright crap.

Oh you haven't gotten thing you needed, you had to do the following up, and we screwed up? "sorry?".

I've had better experiences with my local stores and Aliexpress.

I canceled my prime membership (of 5 years) this past Feb and I've been happy about it.

Note.. if you want to let it lapse you have to cancel at the right time or strip off the CC on the prime account. If you completely cancel you prime membership it's gone right then and you don't get a prorated refund on the time it had left.