Probably works just fine for spring type snow. Not a good choice for new snow or cold snow conditions.
I mostly tune my families gear in the basement, though occasionally get tired of that and use a shop maybe once per year.
The phantom base treatment Tony references is very decent. It's not like freshly waxed skis, but more like a couple day old wax job. Probably 80% of the benefits and no more waxing ever.
'Real' waxing is a super weird art form at the level of high end ski racing. Enormous amounts of time and effort put forth by technicians trying to dial it in for very specific conditions each race.
I'm more basic now-a-days. Just use a simple temperature based wax as needed (probably 5-10 days on snow between depending on lots of factors). In Colorado it can be pretty simple as much of the season is simply cold temp wax until at least March. Then have to start playing a bit more with options (at least for racing for my son, for me I just stick to the temp range my very next ski day is going to be).
But like I said, world cuppers and some people are really, really into it and you can go crazy with various techniques and wax blends and etc... trying to achieve perfect wax for a particular day. While it's interesting stuff to know, I don't find those efforts to be worth it for recreational skiing. Tons of work and even waste for tiny gains that only last a very short while.