Camper van Norway
The best way to find out if a company is reputable is to check them out yourself. The first thing you should always ask when looking for a new supplier is how long they have been trading. This is important because many companies change ownership every few years, and some even close down completely. If a company has been around for a while then there's a good chance that they're going to be around for a while longer. Another factor to consider is where they are based. A lot of smaller companies operate from home, but larger companies tend to have offices and warehouses located away from their customers. This makes sense because they don't want to be too far away from their clients, and they also like to keep an eye on things.
When looking at reviews, try to get ones written by previous customers. These are often much more honest than those written by employees who might not know anything about the service they offer. Reviews are easy to come across, just google "campervan review" and you'll see plenty of results. It's worth checking these out, especially if you're planning on hiring a campervan through a broker. Some brokers will put together packages of campervans for sale, which means that you won't necessarily be able to compare prices between different providers. If you decide to buy a package, you'll probably end up paying more than you would buying each component separately.
If you're thinking of renting a campervan in Norway, then it's important to remember that most campervans are rented for short periods of time.