I rented a pocket wifi last January from a different supplier Easymifi same arrangement deposit and delivery to and from hotel.It worked
perfectly but not as good value as Wifivox are now.Cost was sixty euros per week and only 2 GB per week
I had one last year in Spain, superb. Think it was around 7 euro a day but there was a capacity limit. Unlimited was an extra few euros and I would definitely get unlimited next time. Super for everyone in the family most particularly tired kids at night time!
I used Wifivox in Spain in Summer 2015. I found it very useful as there was no wifi at the campsite we were staying at. There would have been multiple devices connected too. I think I paid around 75 euro for 8 days rental.
rented wifivox mobile data device in Salou for 8 days for €51.25 inc delivery. device was delivered to hotel reception and collected form there. wifi was excellent strong enough for 4 kids to watch you tube or netflicks at the same time with no issues.
happy kids, blissful evening dinners for parents, I would definitely recommend if you are thinking about it. we had free wifi in hotel but it was very poor only good for browsing not watching online.