Hi Frostyricho
I think you did ask this before, but that's OK.
This scope will be OK for planets. The thing with planets is they are REALLY small in a scope. They are also strongly affected by seeing conditions. Unfortunately the best way to beat these 2 factors is to either go a bigger scope or be very patient waiting for the moments of still atmosphere. This all particularly applies to Mars as it is so very small.
That said you will be able to make out details on the planets. Just also be aware that Mars and Jupiter are past opposition now so you will have to wait until next year to see them at their best.
That all being said, an 8" dob is a great starter scope for deep space objects. Enough aperture to nab some truly marvellous objects while still being easy to handle and use. Orion is starting to come back into our skies in the mornings so the Great Orion Neb (M42) will start to become easy to see which is simply spectacular through an 8".
Let us know how you get on! Oh and I saw on previous posts some urging you to consider a 10". If it is within your budget and you are comfortable with the size it is worth considering.
Malcolm
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