

Budget Car Hire Car Rental (France) wins Paris Ville's WPM Compare Award for ranking highest in an overall average based on 3 criteria values of Usability, CRM and SEO.
Budget scored high in Usability (SiXT too), extremely high in Customer Relationship Management and average in SEO.
The reservation form process is a major factor in evaluating a Car Hire Car Rental company's online presence. Part of the criteria was based on the elements in this section; Agence de départ, Agence de retour, Date et heure de départ, Date et heure de retour, la carte de fidelite and promotion code, etc.
Budget and SiXT both came in with very strong USABILITY in regards to this form process. These top two (Hertz came in 3rd) candidates used AJAX and jQuery with optimal precision giving the customer (user) an intuitive experience when booking a car rental in France.
The AJAX overlays were filled with useful data like addresses, open hours of operation and telephone numbers. A sample short advance booking for 2 days for Paris Orly Aéroport Ouest for the cheapest car, Renault Twingo, displayed Budget online price as 108,96 EUR and SiXT displaying € 144,00. If you drive less than the 500 kilometers (500 Kilomètres inclus) in 2 days then Budget is the cheapest.

A
look at Customer Relationship Management for these top two appear that
both companies do try to resolve rental issues. Budget appears to actually
complete the resolution where SiXT appears to fall behind them (the other
top 10 had different scores).
Keep in mind and contrary to Paris Ville's criteria, SiXT was voted in 2009 by Travel and Leisure Magazine as "the world's best car rental company" from their reader based poll (web data).
Most problems arise from clients failing to get service agents to sign papers regarding the state of the car, i.e., damages, which usually happens from dropping off the car after hours.
A few safeguards for after-hours customer is to buy extra insurance, take photos, save the damage release papers, dispute and cancel credit card charges immediately. Also, reporting disputes via web blogs like TripAdvisor, seems to expedite resolutions in some cases.
The Travel & Tourism Car Hire / Rental WPM Audit