I have had Sram on my last two road bikes and on my last mountain bike. Great shifting, yes it is positive and makes an audible click rather than Shimano wafty silent change, but I like that, it reminds me of a sequential shift in a race car rather than a wafty smooth change in a saloon. Each to their own though. It is a bit like saying do you like a noisy Hope freehub or a silent Shimano one, personal choice.
Over 50,000 miles on the two Sram shod road bikes I have had four failures. One was the same thing when a ratchet in the shifter lost some of it's teeth. Apparently a common fault on sub Red 10 speed shifters at that point in time. The first was replaced under warranty the second was beyond warranty expiry so I had to buy a new shifter. I have also had a Tiagra Shimano shifter fail in a similar way. I also had an Apex front brake caliper fail, mind you I have had shimano calipers seize, I do tend to ride my bikes in all weathers salty and water being sprayed at metal compomnents is always going to knacker them. The final issue I have had is a non drive side Sram Red crank arm delaminated or debonded slightly from the splines where it attaches to the BB so there was a slight give/wobble whilst peddaling, the crank had done at least 40,000 miles but it was still dissapointing. I have cranks on bikes from the 80's that a still perfectly functional. It may just be a risk with modern carbon cranks. One thing I have not noticed is a particularly short BB life. Despite Hambini et all slating the GXP system I have not found them to capitulate after 2 to 3k miles I normally get 8 to 10k miles out of a bb which seems similar to the Hollowtech 2.
The mtb has so far been fine but time will tell.
I would caveat all of the above with I have had fails on Shimano components over the years and I have had a lot of shimano stuff both on road bikes and mtbs.
My view, Sram is fine, but sometimes has issues as does Shimano. When they do have issues they seem to deal with it. I chose it as I preferred the definite gearchange action, the weight at a pricepoint and the shape of the shifters. Would I buy another Sram shod bike? Well I have with the MTB. Would I buy Shimano again yes.
Is Sram a bit crap? No not really.