I rate this as an essential accessory for this type of 'scope. A recent addition is the Orion Short Tube 90. This means the telescope in easily carried on aeroplanes as hand luggage. I put it in an airline trolley bag, packed round with polyurethane foam, along with the eyepieces, star atlas etc. Optically it is quite reasonable.
Higher powers are okay, but bright stars do show some colour.
As an easily transportable telescope, it s highly recommended. I use a sturdy Swarowski tripod as a mount.