What's the point of the "enter site" page? Just seems like an obstacle to me...
Once you get into the site (which, btw opens in a new tab from the splash page, another annoyance IMO), the images loaded fairly quickly.
I'd move the menu from the bottom to the top - If people are browsing on a smaller monitor, then they might not see the navigation straight off, and leave in frustration.
I think you need a much larger set of images than you currently have, split down into specific categories, as I don't think there's enough content, image wise, on there to give people the confidence to book you.
Also, you should have a contact form on your contact page, as well as the additional contacts. Some people would rather just fill out a form and have it delivered to you, rather than having to start their email program, cut and paste your email address etc.
Overall, I like the cleanliness of the site and design, just think it needs some more content to fill it