Coyle is a good company. I did a hotel shop with them when I had very little experience. The evaluation form is straightforward w/less narrative than most hotel shops. It is true you have to charge the room, restaurant, room service, etc. The hotel chain credits your card within a week or so. It only took 3 days when I did the shop. Coyle pays you a fee and reimburses you the cash tips you gave. That is normally 3-4 weeks later. I found them very easy to work with and like I said.......I had only been a shopper for 4 months when they gave me the hotel shop. Back then, you had to handwrite the evaluation form and fax it in...thank goodness it is all online now.
Every month, Coyle has hotel shops in my area.......they do have a 90 day rotation here but there are 3 locations I can shop so it is nice.
Since you haven't shopped yet, I would advise you get some shops under your belt before responding to the hotel shop offers.........because IF they did give you one with no experience, you would find it overwhelming. You must ease into this because it can be very intimidating when you first begin even with an easy shop.
Good luck!!