I reviewed the AGO after processing my first 2 B&W films; I've now had the opportunity to process 6 x C41 Colour films so I am adding some additional thoughts.
Having processed B&W for over 50 years this was my very first C41 excursion and I was a little anxious to say the least - the main difference is that B&W is effectively a room temperature process whilst C41 is at 38c, and the temperature leeway is quite small.
I used the Cinestill TCS1000 to maintain the temperature of the chemistry in a water bath - the TCS is reviewed elsewhere, it gets the water bath to temperature very quickly but it does take a long time for the chemistry in the bottles to reach the temperature in the water bath. So be prepared for it or you find like I did that the developer was only at 36c which is outside range.
Also when processing rolls 5&6 I adjusted the developing time as per the instructions and inadvertently turned off the AGO feature that reads the temperature and adjusts the developing time, so there was a bit of guesswork but it seems I got away with it. On rolls 1-4 the temperature adjustment worked perfectly, with at least 1 minute added both times to the development stage.
I have now processed a Kodak Gold 200, Candido 800, 2 x Portra 160, Harman Phoenix and Amber T800, all apart from the Candido were taken on my ME Super (the Candido was on the Pentax 17). I've 3 more Portra 160's to go.
I used the Bellini C41 kit (which AW don't sell) as I like the idea of a liquid kit and it has separate Bleach and Fix. Also there are no wash steps its straight in with chemistry and finish with stabiliser.
My conclusion is that there is nothing to fear from C41 but the AGO certainly makes things much easier. From start to finish, processing 2 batches of 2 films took about 40 minutes, plus the time to get the chemicals to temperature and the clean up afterwards.
The AGO didn't cause any issues, it doesn't leak and I found pouring chemicals in and out to be really simple. Emptying the tank is easy if you pick the tank + AGO up and pour the fluid out from what is the top lip of the tank. Don't try and use the AGO itself as it will be messy. I bought 3 cheap funnels to avoid spillage and had none at all.
Despite the savings on development it will take quite a while to get back the investment in the AGO and Cinestill even though the AGO has come down in price and I was able to use a £100 Wonderpoints voucher. However its a very enjoyable and rewarding additional Analogue adventure and I highly recommend it as a fun way to increase your enjoyment of film.
When I have all 7 rolls of my recent trip to India I might just post a few - but for now I've attached some images from rolls 1 & 2. Bluebird at Coniston and Arnside.