In my opinion, yes, it's dodgy.
Although I've made rather a lot of wine, I only now have my first ever couple of kit wines on-the-go, a Beaverdale Rioja and a Cabernet Sauvignon. I really don't know what to expect from them but have been told they should be on a par with medium to high priced commecial wines.
Again in my opinion, these kit wines are expensive, in the order of £1.75 a bottle if you're making single gallons, dropping to around £1.30 if you're making 5 gallons.
If you're making country wines, they might typically spend their first week in a bucket, but that's it, then they are strained to DJs or other closed fermenters. If you are making juice wines or kit wines, start in a closed fermenter from day 1. After the first rush of fermentation, oxygen is your enemy, keep the exposed surface area to a minimum.
If you are making 5 gallons, invest around £11 in a Young's fermenter. If it's single gallons use a DJ or spend £1 on 5 litres of mineral water from the supermarket, use some of the water in your brew, drink the rest or chuck it down the sink, drill a hole in the lid and stuff in an airlock.