I believe best way is to contact the provider to see how fast the answer is, most of the reviews over the internet are paid, so not a trust source of information.
Of course, you can read the reviews and this is not a mistake, but still keep in mind that many of them are purchased and are not completely true. It's best to really familiarize yourself with the provider that interests you.
Checking the review of the user is one way to go, but it is also based on some user reviews, so I also check their services before making a purchase, such as support and server configuration.