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Advantages

Meniscus: improved image quality
Small size

Advantages:

Meniscus corrects spherical aberration common to Cassagrains and gives best image quality
Compact size and light weight
More contrast and sharper image than comparable size Schmidt Cassegrain.

Advantages:

Image sharp as finest refractors provide for much less cost.
Better contrast with sharper image than Newtonians.
Shorter optical tube than Newtonians (about 15% reduction).
Meniscus protects mirrors from dirt and moisture.
Better observation for objects requiring wide field of view, such as galaxies, star clusters and nebulae.

Revolutionary Maksutov Newtonian telescope with reflex finder (US Pat.# 6,172,806 B1) allows the observer first to find the targeted section of sky, then to switch to high-power for viewing – all through the same eyepiece. There is no parallax, no alignment, no need for a separate finder.