No merece más...

It's thoroughly bad English, but I assume they mean "round out" instead of "fill up."

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Note added at 33 mins (2006-08-31 01:21:36 GMT)
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Presumably, it follows a description of other services. These two final ones round out / complete their offering to make this the visitor's favorite hotel.

The English here is absolutely hideous and looks like a machine translation from another language.

So let's first put the sentence in passable English:

Ample parking and great customer service will make John Lake your favorite hotel from now on.
[There are other possibilities, but this will suffice for present purposes.]

Having established that "fill up our efforts for" is really just an idiom expressing the idea of "to make" or "to cause", translation into Spanish becomes easy.

Suerte.

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Note added at 45 mins (2006-08-31 01:33:52 GMT)
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Steven's interpretation of "to fill up" is certainly correct, but I don't think that a literal translation is really necessary here. A sentence with *hacer que* would *imply* a *summing up*.

Otra opción.