I have the Mafell 40 which is great for cutting sheets, it is powerful yet lightweight. I don't need to trim doors or worktops, if I did I may have bought its bigger brother. I actually choose this after having one on loan and was impressed with how light and comfortable it was to use.
I also have a Mafell Biscuit Jointer which is also well made.
I think if it's capacity is adequate then it's a very good tool and you can save a few pounds over the Festool, be sure though that you can live with its limits, if not go for the bigger one or the Festool.
The cut quality on the rail side is very good but there can be some flaking on the other side. I'd suggest that if you use veneered material you should compare both as I have a feeling the Festool may have a bit better anti-chip system but I have never used one so don't know how they compare.
Can you find a dealer who will let you try before you buy? No better way of making your mind up. Where abouts are you - are there any good dealers nearby or shows coming up? It's one big advantage of buying in person, not via the internet, you can get your hands on the gear before deciding. Alternatively if you are near any of the members here they may be persuaded to demonstrate their own choices.
Regards, Colin