Yes it's safe or compfortable for who new in London and wants to see amazing destination of London. Here are some benefits of this:

• They offer transfer services 24 hours a day.
• They provide various types of transfer services at affordable rates.
• They offer high quality vehicles that are comfortable to ride.
• They will pick you up from your location and drop off at the airport on time.
• Their services is available even a short notice.
• Their drivers are professionals, experienced and -licensed.
• They provide discounts and special offers that considerably lower the tariff rate.
• They can provide state-of-the-art modern, luxurious and air-conditioned vehicles
• They offer various modes of payment.