What's your thoughts on them? Good idea or no? If yes, do-it-yourself or professional install?
The only hard part of the DIY is trenching if you have to go through roots. If this isn't a concern, it's dead simple. The professional ones I have seen do have beefier cabling, but in my experience it doesn't make much difference in likelyhood to be damaged.
I have had to repair the professional installs for myself and friends/family often enough that I recommend DIY with a shallow depth (2" at most) so it's easy to locate and repair breaks.
And if you do need to find a break under the ground, the super cheapo cable-break locators ($20-30) work just fine, but you need to remember that the signal will absolutely radiate from one end of the fence cable to the other if they are run parallel when going into the base station, which is how professionally systems are often installed (connected until they exit the premises then they split). So I would recommend not running them together at all, or having an above ground accessible section right before they split for an easy to access area that is basically guaranteed be before the in-ground break, then you can cut one leg and then test down the other leg to find the in-ground break.