Hey Stretch.... welcome to the community.
I have one of the Rigid oscillating spindle sanders. For the price point, its a great tool. FOR THE PRICE POINT!!!! You'd be hard pressed to find one this good for the same money. Nice large platform to work off of. Dust collection is so/so at best, but it works. The stroke on the spindle is a little shallow for my liking, but it has served me well none the less. Never had a problem with belt tracking to speak of. Tightening or over-tightening of the spindle knob has only been an annoyance from time to time. Don't over tighten it and you'll be fine. The unit itself is kinda light weight and flimsy. Great feature if you're constantly pulling it out and putting it away. Just don't drop it!!! You got to put some effort into it to bog the thing down. The provided sand paper is again so/so at best. If your plans are to use it in a light to medium duty hobbyist setting I'd say its a good deal. If your plans border on commercial use, then save a few extra bucks and get a more stout unit. My biggest concern was and still is if I have a problem with the thing, The reviews read as if warranty repairs and/or replacement is pretty lame.
"..... limited only by imagination"
"Just smile and wave boys, smile and wave"
Skipper the Penguin