The Teraminx is a 7x7 megaminx puzzle which makes it an interesting challenge, if you can solve a 7x7 and a megaminx then you should have no issue solving the Teraminx, however, it will take a long time, the DianSheng Teraminx makes that solving experience more enjoyable as the puzzle has magnets allowing all the layers to align better, it also just has a better design in general so turns more smoothly anyway, I would highly recommend this teraminx over the other teraminxes on the market if you have the budget for it.
Other Posts

Why the 1x1x1 Cube is Actually Worth £8349.42
A documentary 3 years in the making. One cube....

New QiYi 3x3 Warrior M coming soon
QiYi have recently released a new magnetic budget cube which may be pretty groundbreaking. The new QiYi Warrior...

QiYi are releasing another clock colour (green this time!)
QiYi have recently announced that they will be releasing another QiYi Clock colour. QiYi currently offers three colours: ...