I’ve got the TT315LRH and so far there have been no cons. Tracking and dialing is consistent, turret clicks are the best I’ve ever tried, and the Mrad reticle is great for hunting. Some may say it’s a little thick for 1,000 yard shooting, but I’ve gone to 900 busting rocks and the reticle doesn’t obscure the target.
TT is the finest rifle scope available, period. My only gripe is that I don't care for the reticle but it works for many people. I can afford a TT but bought a ZCO because I really like the reticle and I'm not going to buy a TT just to say I have one.
If you like the reticles that Theta offers, buy one and rest assured that you didn't leave anything on the table and you won't have to second guess yourself about quality or performance in every aspect.
I own a TT 3-15M with Gen2 reticle, use it exclusively for hunting. at 3 power the reticle is a little thin but it has never cause me an issue. I have owned a ZCO 4-20, Kahles 3-18 and SB 5-20. The issue I had with all these shorty scopes is the parallax is just not as forgiving as the TT since its a full length scope. Its not an apples to apples comparison but at he end of the day the weight difference on all these scopes are pretty close and the TT beats them all in every way. Glass, parallax, turrets and FOV. I will say the ZCO FOV seemed to be a little better but hated the Mpact 2 reticle, just way to cluttered. The absence of locking turrets has been no issues as they have never once spun in the field. I would like to try the TT LRH as I would think the reticle would be better suited for hunting application. The TT is simply the finest scope on the market. There is a reason they are priced where they are and once you own one you know where you money went. If you have the money I would certainly put it on the TT.