We rented 4 bikes plus equipment for about a week. Bikes and equipment were fine, but people and policies not so great. First, when we decided we didn't need a trailer, they charged us for half of it anyway for the week since we had reserved it. Understandable, but not wonderful. So err on the side of under-reserving.
Returns was where problems were. Man was surly and unpleasant and confrontational - he grabbed a tube out of my hand that I had purchased, accusing me of not having paid. So even though we had just spent hundreds of Euros with them, he accused me of trying to steal a 5 Euro tube - insulting and unpleasant end to ride.
I noticed another post like this in which they acused renters of damage and were very unpleasant. I'd go elsewhere if you can find what you want there, or just go in expecting "all business" and if you get the wrong guy, a bit worse.