I put the Vesta Imersa Elite to work shortly after receiving it. I did not download the app for the first cook; I simply used the cooker as a standalone unit. That was only a 25-minute cook for sausage, and it worked really well. The Start/Stop button is a bit sensitive, so it would register a touch twice. It was a bit annoying, but nothing I couldn't work around.For the second cook, I downloaded the app, prepared the 12-quart container and lid that I purchased specifically for sous vide cooking, and got ready a 4.5 lb Boston butt. This unit is being returned after the experience I had with it during a 24-hour cook:• The app: The app is so close to being a straight-up joke, but has a couple of redeeming qualities. You need to give it permission to access all of your folders, make calls on your phone, your location, and the camera. I could not get the app to connect the cooker to my wireless unless I allowed the phone, location, and storage permissions. I did not need to allow the camera permission. The Vesta connects to a wireless network and does not have Bluetooth, so none of these permissions make any sense.A 2.4G channel is a must; the cooker will not connect to a 5G network. Once connected, it was finicky and dropped the wireless icon twice before I was able to reconnect and get it to hold a connection. Once connected and I was able to view it on my phone, I kept getting Android notifications stating "Device Timeout," even though the app seemed to be functioning fine.Pressing the Settings function while in the cooker is active and connected will cause the app to crash. I tried it several times; each time the app crashed and logged me in again.The Recipes and Cooking Guide are decent, and I like the ability to select what I'm cooking and send it to the device. It's a bit clunky and doesn't automatically start the device, but that's probably a good thing as it ensures you're ready to cook.There's a definite lag that lasts several seconds when you open the app to check on the cooker, but it does connect remotely while I'm on cellular, so that's a plus.• The sous vide cooker:The box it came in was obviously dropped and had one of the corners pushed in enough that it split the top of the box. The device itself is packaged well, and there didn’t seem to be any damage at all.It’s larger than one would think. The Dutch oven pictured is a 26 cm/4.1 liter, and the cooker barely fits to allow the water line to be above the minimum level.It does not fit round pans/containers very well due to its shape and width. I had to open up the hinge all the way and rest it on the handle of the pot I was using to get it to stay in place properly. You will definitely want to purchase a square container for this.The hinge is weak and doesn’t grab a surface well when closed. There’s a ton of flex in the joint, so it never has what I would consider a strong grip on the container. Probably not a huge deal since I cut a hole in the lid of the container and there’s nowhere for it to go, but it simply doesn’t feel durable.13 hours into the cook, the Imersa Elite threw an E02 error, which translates to “Possible Obstruction of Water Inlets.” There was no obstruction of the water inlets. By the time I woke up and discovered the issue, the water temp had fallen to 120 degrees. Fortunately, the temperature of the roast had dropped to only 133 degrees, which was well within the safe zone for food. I pressed the Start/Stop button and the cooker fired right up and didn’t stop again.It chirps randomly. I don’t know why, and it’s not detailed in the instructions. After it threw a random error, I was constantly checking on the cooker to make sure it was OK. The random chirps make it even more nerve-wracking.On a positive note, the Imersa Elite gets to temp really quickly, then holds temp like a boss. It never fell below more than 0.2 degrees of the target temperature once it got going; the majority of the time it fluctuated within 0.1 degrees. Well, except for the time it threw an error and fell 30 degrees below the target. But it’s seriously good at maintaining temp when it is working.The unit can be descaled and cleaned easily. This is a bigger deal than most people may realize. Remove two screws, take off the cover, soak the unit in vinegar/water, clean, put back into use. That’s such a great feature to have.Overall, I think the Imersa Elite has a lot of potential, but there are some issues that are worrisome/frustrating enough to prevent me from recommending it. It’s possible that I could never have another issue again, but I’m too nervous about the random error and too annoyed by the app’s shortcomings to keep this cooker. If I'm going to give away all of my information to a company, then I'm going to give it to a company that gives me something other than frustration with their app and a constant worry that I’m going to waste food or give my family botulism.