I don't know if Humax have updated the box since I put a sledge-hammer through my infuriatingly slow and buggy box but it really comes down to your needs.
The Humax is a bit long-in-the-tooth technologically and the software has never utilised the hardware properly. However there are a number of potentially useful hacks around now.
If you just want a box to watch and record Freesat TV then my recommendation would be the Echostar HDS-600RS. The Echostar performs well, it is easy to use, it is responsive, Echostar fix bugs quickly and it provides Sling functionality as a bonus.
Even if you don't want the Sling function the Echostar is still a better machine for watching and recording TV in my opinion, but if you ever want to get your recordings off the box you'll have to go down the Humax route.