I've used this for a variety of projects now and always found it to deliver. It's fairly powerful and has easily changed sanding discs. As it's fairly lightweight I could also use it for a long time, which is handy when having to hold it up at shoulder level for example, like sanding walls down.
All in all it has performed very well for the jobs I needed it for (sanding down polyfiller, workbench, outdoor planters). I wouldn't recommend it for heavy duty sanding, but for anything else it should do well.