Yeah non of them will collect, it's in the design as they cut every day so the clippings are so small they just fall through and compost down to feed the grass. The cut they give is superb. No matter how frequently i cut my lawn with my push along petrol it never looked nearly as good as now with the robot doing it.
How does it handle wet days?
It's been so wet here I haven't been able to cut for weeks. Some of the grass is a foot long!