I have a Capstan 1000.I like it alot,very simple to use,and you dont have to worry about your rope pileing up in your anchor locker,and jaming it up.There are much better ones out there,but you have to know what size chain,and rode you need.I prefer to use bigger chain,and a 16.5lb Bruce copy anchor.I like to have alot more weight so the anchor holds better,and I wont have any surprises after I come up,and my boat is still there

...been there done that once.
Don't use your windless to take up the scope on your rode,put the boat in gear,and pull up the scope by hand,when you get straight up and down then you let the windless do it's work.Once I hear a load building up on the motor,I stop,I dont wanna burn up the motor.There are a few tricks for getting your hook out of the holes,and off the bottom.
You were thinking of the 500 model...I would go a little bigger.IMO a little bigger is a little better when it come to a windless.Kinda depends on what your going to do w/it..ie..anchor overnight.Get on your spot after you get some good marks.
I ask this cause if you need it for overnight..you want ALOT of holding power,this means more chain,and bigger hook,bigger windless.
Just wanna get on your spot,and just hold there..you might be able to get away w/a little less.
I think of anchoring up kinda like a saftey deal for me cause I dive,and leave the boat....so for me bigger is better.
Think of the weight,and length of your boat,and then put a little safety factor in that thinking if the wind comes up.
Keep us in the loop.
MJ.