Fast, solid, ambitious, and improving from already high standards. I've used it for about two years. It's reliable and has never failed or given me hiccups during use. It has two options for use (Windows). Either their own app using traditional login - or - using Wireguard with preferred settings. The latter is quick and is easily turned off or on whenever I wish.
I've been coming back to AzireVPN for several times now and was never disappointed. What I truly like about AzireVPN is their support of wireguard (protocol and further development), acceptance of cryptocurrency-payments including Monero (!), and their good service (got very helpful answers, not just wildly combined standard text-fragments). In my opinion, another key-factor for trusting AzireVPN in regards to their intentions of providing optimal privacy is the fact that they don't force their users to supply email addresses upon registering an account. I've seen other seemingly popular services claiming to offer the best available privacy rejecting email-addresses from anon-mailers in mandatory fields of their registration form... yeah sure. The amount of locations offered is absolutely sufficient for my needs and yet has been growing noticeably during the last 12-18 months while keeping their prices constant. I'd therefore fully recommend this AzireVPN to anyone looking for a privacy-oriented VPN service.
I've been with AzireVPN for around 2 + years now and I cannot remember having any problems with their service. I haven't got the best connection in the world (roughly 80Mbps) but I still get my usual speeds whilst connected, plus my ping in games is actually lower when connected to some of the locations they offer. Obviously like all VPN providers we have no way to know if they are actually keeping logs or not, but in two years of downloading Linux ISOs I haven't received any letters. I cannot comment on customer service as I've never needed to contact them.