I have used the Huawei E5776 4G Mobile Wifi. Its a fairly small device and works nicely for sharing with up to 5 users.
Did a search and found this: Huawei R215 4G LTE It supports up to 10 devices. (PS: Don't know the shop)
Been happy with mine, but the last couple of trips now we have been getting prepay SIMs where we have been and used our own smartphones + sharing of data from them.
Just got back - I did this in the UK with a sim from three, worked like a champ.