The CA gets worse with aperture for a fixed f-number. I have not looked through one of these scopes but on paper it should have lots of CA. A naive paperless analysis tells me that you need to increase f-number in proportion to aperture. So eg a 75mm f/4 would have the same CA as a 150mm f/8, all else being equal.
You can tame CA with filters and in even more clever ways (but filters are the easiest and cheapest off-the-shelf solution). If you can easily afford the scope and you're curious to try it out then get it. You'll have fun with it and you'll learn stuff.
