Do not trust any good review on this business. They are probably postedby their own employees or something. Check for your self on trustpilot and other well known rating websites to confirm. You will see that dubaievisaonline has a very poor rating.
This website is a complete scam. I have applied for UAE visa unfortunately without knowing you can apply through more trusted channels like the airline companies (Emirates, Air Arabia and Etihad). They charged me 500 USD for 14 day visit visa (don't think such a thing even exists. The visit visa is 30 days on any other channel)for 3 persons (including my infant daughter). They charged me a full visa fee for an infant! (btw through emirates website, the visa for an infant is free). It says on their website that the visa is processed in 3-4 days. Whenever I inquire about the status of my request it says "Under Embassy". I sent many emails to their support but got no reply. After 8 days without anything happening, I communicated through their Whatsapp chat. It felt like a bot not a real person talking to me. I persistently asked for a refund but she wouldn't give any straight answer to any of my questions. She kept saying "Our team will update you soon", "delay in embassy" etc. She refused to start a refund. I decided to contact my bank and report the transaction as a fraud and cancelled my credit card just in case. I applied for the Visa through emirates website and the total charge was 220 USD for 30 days visa (compared to 500USD and no visa by these frauds). I will still contact the Ministry of Tourism of Dubai to warn them that there are scams such as these sites. Hopefully they can get them discredited or removed from existence.