Other brands are just as good as firing bbs at people but TM are one of a few manufacturers that offer a feature set (EBB, Stop on empty and a cycling bolt).
This is pretty much it. If you want to have interactive features that should have been on other AEGs decades ago, you choose between a PTW ($2.4k plus $145 magazines if you want recoil), ERGs (nice, but flawed in a lot of ways NGRSs aren't), and Recoil Shocks. If you don't care about recoil you could add the regular PTWs (£1k+, haven't advanced in a decade), the Scorpion EVO3A1 (excellent gun, though no recoil) and the VFC MP7A1 ~AEG (like the Scorpion, but the price of an NGRS). If you don't care about any of those features, then it's probably not going to be worth the money to you - if you're complaining about having to buy a few new
magazines it's a good sign your priorities don't really align...
The real alternatives to Recoil Shocks - recoil, interactivity, trademarks and good externals - are really higher-end GBBRs, not other AEGs. Sure, the performance and build quality of a basic M4 AEG can be comparable to an NGRS, but it's also a straight clone of a gun that came out the same year as the original PlayStation. A GHK is price-comparable to a SOPMOD, but with magazines that are triple the price, half the capacity but 10-20x as expensive to fill, and very sensitive to temperature changes. The GHK gets far more recoil, the Recoil Shock gets far more reliable operation. For me it was totally worth the cost - I couldn't get that combination of features anywhere else.
Incidently if you aren't aware that TM A) supply .25s and B) TM BB's are about the best available you PROBABLY shouldn't be reviewing airsoft kit...
There are about 200 reasons not to buy a Recoil Shock over something like an Avalon, but that video is still complete wank.
I'm not 100% but from what I've gleaned a stock erg does not have the reliability or longevity of a stock TM.
The ERGs have issues of their own - the AKs (just like the TMs) are a typically naff Japanese design, rather than the far more modern VFC style, with aluminium externals. The M4s are actually pretty good - I'd recommend them to Americans (who want 400FPS easily), and to people who want to use regular magazines without an adaptor. Both suffer a serious lack of aftermarket support which means the upgrades you can do to tailor a TM to what you want it to do (e.g. DMR roles) or to add new features (e.g. precocking) aren't possible.