I will give you a little different perspective here.
I'm a hobby builder, so build for myself and make lot's of boo boo's - it's constantly a learning process.
In my opinion TVM fills a gap and for the "target audience" they do it fairly well (individual issues aside).
The quality of the components they use is miles ahead of the "off the shelf" rifles (Lyman, T/C and even Perdersoli). I build my own rifles from the very same components.
When I look at TVM's prices I'm sometimes surprised they make any money off a build.
For example, I pulled up the first rifle he has listed which was the Tennessee rifle which is listed "with basic brass parts" (so a step up from the poorboy) for 1080 bucks - knock off 100 if you want it in the white.
Now, I cut my own stock blanks at a cost of about 30 bucks each for curly maple, but if I bought a shaped and mostly inlet for the components TVM is using it would run about 160 bucks.
A straight Green Mountain or Colerain barrel will run you 150-160 bucks - add another 10/15 for the breech plug, plus another 25 if you want it fitted.
(I just ordered a Rice Swamped barrel for an upcoming build at a cost of $310 bucks including shipping - swamps are more expensive)
Add 100 for the Siler lock (percussion) or 150'ish (flint), 20 to 50 for triggers (single or doubles), other furniture (trigger guard, butt plate, nose cap) can run you 40 to 100 bucks depending on how much finishing you want to do yourself, plus the odds/ends - barrel pins, screws, a couple of bolts, sights, barrel lugs/tennons/staples - 50 bucks wouldn't be out of line.
So even though my math is bad, just the parts often come in a touch over 600 bucks (that has been my experience). That still leaves (me) as the builder, a couple hundred hours worth of work plus the cost of finishing (maybe another 20 or 30 bucks for stain, oil, barrel blue/brown etc plus alot of more hours stretching a few days if you want a rust brown/blue barrel).
They are doing all that work for about 400 bucks - not alot of "margin" there. Plus they have all the tools etc to do the job (if I went to set up my wood shop today from scratch it would run thousands).
So no, not a "bench copy" or "difficult to distinguish" replica of a specific rifle. But, in my opinion a whole lot prettier and better quality components than a Lyman or T/C or even a Pedersoli (which some models are close in price to a TVM rifle).
But definitely a collection of quality components assembled rather inexpensively.
If you are looking for a $5000 rifle you WILL be disappointed (it sometimes takes a couple to a few hours to perfectly tune a double set trigger - I wouldn't expect perfection in a rifle at this price), but if you have done your homework, decided on a design you like and want something that is a fairly good step up from a production gun at an affordable price, I think anyone would be pleased with a product from builders such as TVM unless you are willing/capable to build yourself.