Like anywhere in the market place, there are any number of different qualities in service to choose from. Although price is not an absolute indicator of quality, it is a guide and should be considered. An inexpensive repair may mean that in the long term and often the short term it may in fact be more expensive when you consider what you're buying.  

The world of horology got it's big break in military applications where it was used to determine longitude so that ships at sea could tell very closely where they were in relation to their latitude. It was a big, big deal and John Harrison was the fellow that blew the lid off the whole thing. England ruled the waves for many years on the strength of his chronometers. It's a great story in book and in film and for the curious, it shouldn't be missed.  The secrecy involved in such a valuable tool with military applications was very tight for a long time.  

With this bit of history in play, horology and it's fine points remain obscure. I've seen some poor repair work out of the UK and many other countries and in Canada there isn't an over seeing body to regulate our trade. We may see machinery in our shops that are worth as much as a car, but unlike automotive mechanics there is no shred of insurance that the watch or clock maker you hire has any formal training at all. Buyer beware has never been more critical to the security of your keepsake. Please educate yourselves and choose your trades people wisely. 

I hope this helps convince you all that, although the case, dial and hands may be pretty, the machinery holds value an requires your attention too.

A classic mistake. This clock pallet is supposed to slip on the shaft, but there was a misunderstanding that lead to someone trying to solder them together. Knowing how things work is key to avoiding mistakes like this.

Erroneous soft solder pallet repair
The next two images of large clock chime hammers are another example of how soft solder isn't often appropriate for repair work. These hammer heads continued to slip on their shafts because there was only the adhesive properties of the solder to hold them. The required a rivet or pinning to remain in place and aligned to strike the bells properly. I'm not fond of soft solder.
Bad soft solder chime hammer repair
Badly soldered clock chime hammer head
This, in my experience, is a rare botch. This pocket watch balance staff pivot should have broken. The enormous bend in the pivot indicates that the material the shaft was made from was not well hardened and tempered. It would have been fantastically easy to manufacture, being that soft.

Bent watch balance staff
These hammers play on beautiful tubular bells that hang down the case back in a high profile clock location in Winnipeg. There was a lot of work involved in bringing it back to a fit life. I replaced the wire pivots with riveted pins and skinned the hammers with deer raw hide. The tone was much improved.
Messy tubular bell hammers
The neat open end tear on this clock mainspring end is quite a common failure in mainsprings.  The rough and jagged hole ahead of the neat tear is what was provided as a repair. The hole is to anchor the mainspring end to the barrel so it can be wound up from the arbour and not slip. The mainspring was replaced in this repair, but a repair should involve trimming away the broken end and cutting a tidy hole with a taper on the outside edge of the new hole to grip the barrel anchor well. This jagged one could have damaged the barrel.
Poorly punched mainspring hole
Using punches to move worn material back where it came from is very popular. Not with me. Here a punch has been used to drive material back to compensate for wear. The repair should have been to establish centre, drill and install a bushing.  This type of repair simply doesn't work.
Badly marred Omega watch bearing
An even more dramatic example of a very poor bearing repair. Clocks need bearings.  They run too long on too little lubrication to avoid this type of wear. Establishing centre again and installing new bearings is a very common repair. This is not the way it's done and as can clearly be seen, this style of repair doesn't work.
Badly peened worn clock bearing
Sadly short of the requirements for bushing work.
Badly punched clock bearing
More badly marked clock bearings. This shows the colour of the lubrication well. When lubrication is this dark it behaves more like grinding compound than lubrication. It's no different in any machine. To last, a clock needs good clean lubrication. I recommend cleaning a mechanical clock, tradidtionally, every three to five years if not more.
Badly punched clock bearing