FYI, We used Xcomglobal rather than Pocketwifi but it seems some of the issues are similar. What differed was that Xcom did respond and communicate regularly. But...... I was abruptly shut off after 1 1/2 days without giving me the opportunity to examine our habits and fix the problem by decreasing our usage. And as much as they were communicative and responded to my complaints (sent via the computers in the lobby), they were unable to get our service reinstated during our stay. They did say that they were attempting to do so.
I will say that on on our return and after receiving the return of their device, they credited me for the days I was unable to have internet service. They had said they would examine the information on the device and consider my request for a refund. It probably helped having that email stream of complaints that I would have used to complain to my credit card.
I had shut off all automatic downloads, data roaming and uploads and stayed in airplane mode with wifi added the entire time. The first day (only), I may have forgotten to shut off icloud backup (would have only happened the 1 night) on 1 of 5 allowed devices but I was fully backed up before my US departure so there should not have been that much. I had taken no photos, videos, music, etc., made any phone calls or downloaded any documents that would have added the amount of data they claimed.
Like Lisa, we only used it for email, texting and a little researching the local area restaurants, etc. The day we landed was a big news day (!) so I think I may have glanced at some news articles. The next day we did none of those extra things and even left the device in the room for the day. They still claimed extremely high usage for 1/2 the day.
If we are unable use it for basic connectivity, what's the point?
My complaint though is also with Harborside and Atlantis. At the VERY least, they could offer free Wifi in the lobby or allow Starbucks to send our their signal. That would be so much better than waiting for the slow the computers in the lobby. It didn't help that almost every ad on the TV in the room was for phone or internet services. This day and age, even the most remote locations around the world offer that accommodation.