I can't vouch for the quality of their products or service, but I know Robocoin is one of the leading Bitcoin ATM manufacturers. According to Coin ATM Radar, there currently are 44 Robocoin ATMs operational worldwide, in the United States, the UK, Canada, Spain, Japan,... Robocoin provided the very first Bitcoin ATM machine in the world, in October 2013 in Vancouver, Canada.
They are currently ranked 2nd, after Lamassu with 90 ATMs. But the Lamassu ATMs are mostly smaller and cheaper one-way machines (cash to Bitcoin), although they do sell a two-way solution now.
On Coin ATM Radar, a total of 267 operational Bitcoin ATMs are registered at the moment.