Are there guesthouses or hotels with fast internet in Vientiane, Laos?

Does anyone have experience staying somewhere with fast internet in Vientiane, Laos? I am going for only a few days for a visa run, and in the past I found decent places with barely adequate internet for checking email sometimes, but had to work from coffee shops. Would be nicer to be able to work from the hotel / guesthouse and work in the evening.

Alternatively, does anyone have experience with Laotian 3G/4G providers, how well do they actually work, which provider is good, etc. Thanks!