Battery life is a paltry 5 hours, to be expected in a tablet at this price. It's response is rather slow and the hudl's screen is more vivid.
It is what it is; a budget buy. It does offer the buyer his/her money's worth, because it is not a high priced tablet.
Medion is owned by Lenovo and, as we know, it has received some negative reviews for the screen performance/appearance.
One needs to be aware that, although the 3 year warranty is most welcome, if the performance is poor, that is not a fault with the tablet.
Also, what is the returns policy with a tablet? Under DSR, it can be returned, as it wasn't seen/held before purchase. Currys instore sales returns policy is to return, box must not have been opened. The online sales policy on refunds is based on DSR. Because you are going in to Aldi to buy it, the staff could insist on the box not having been opened, if you are returning it just because it is no longer wanted. Check with the shop before you buy.
Obviously, there should be no problem with a faulty product.