I'm on island right now and get my e-mail every morning at 07:00 asking for temperature reports. Oddly enough, the others I sailed in with aren't getting those e-mails. But they used an agent to clear in and I used the EHAS site myself...
I just got home on Friday after 2 weeks on the island. My experience was the same as others. Bright and early got the email, but only for 4 days and they stopped. It was easy and nothing complicated.