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Yes this is the vendor that needs to correct its description of the telescope. 150mm, f10 with 1900mm focal length does not compute.
The 5” (127mm) is f15 with 1900mm focal length but the extra aperture of the 6” will help with the fainter objects and resolution. Not a huge difference up perceivable.
The mount is a nice in concept with the ability to attach a second tube assembly easily for a wide field complement to the 1800mm primary OTA a very nice feature. Of course this can be done with other systems with all sort of mounting rails available.
I agree this could be your planetary/lunar telescope with enough aperture to see the brighter globular clusters and planetary nebulae. It is quite portable too but you are relying on full electronics to move it around as far as I can tell, (as with many other telescopes sold today). It does seem a good choice as either first or second telescope that if looked after will last as long as the electronics can be supported and if the mount fails you could always detach the OTA and use on another mount.
You’ll be shopping for eyepieces next and something around 12 to 8mm for planets would be great giving you 150x to 225x. A 24mm would give you 75x and 15mm will give you 120x. You can do it with a zoom if you prefer. On nights of exceptional seeing you can go between 257x and 300x with a 7mm or 6mm eyepiece or a quality Barlow. Perhaps if you get this telescope start another thread on eyepiece choices; there will be as many responses as there are eyepieces available.
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