I've had a couple of Blackstar amps and I do enjoy them. In general they cover quite a lot of ground and are very flexible.
I've had the HT1R combo, HT60 2x12 60 watt combo, briefly had a HT100 head (it was damaged in transit so was returned), and also had the S1 104EL34. Cabwise I've had the HT212, the Artisan 2x12 cab and the S1412B. Also, I used to have the HT Dual pedal. Ok, so on reflection I've had quite a bit of Blackstar gear!
Overall the HT series is good value for money. They sound darker and a bit more compressed than the EL34 S1 heads but they're capable of quite a few good sounds, are much cheaper, and seem to be built fairly well too. My HT60 had a power valve go fairly soon after purchase but it was replaced under warranty and it was problem free for the rest of the time I owned it. I like the reverb they put on the HT Series and I like that some models have switchable reverb voicing. The emulated out can be quite nice if you'd prefer to work that way than use amp sims. I only sold it to move up to the S1s, which are a different voicing altogether.
I've never tried the ID series, but they seem to get good reviews so far!
I've recorded a couple of clips with the HT 1R and HT 60. These are fairly old but they might be useful to someone interested in the amps. The HT1R can go quieter than the HT60 for home use and is a little easier to dial in at that volume (especially with so few knobs!) but I felt either sounded good for home use.
HT60 ambient dynamic mid gain stuff, all gain changes are pick dynamics (stock combo speakers used, mix of SM57 and Audix i5) - https://soundcloud.com/maxmoujaes/this-journey
HT60 rock riffs (Mesa Rectifier 2x12 used, SM57) - https://soundcloud.com/maxmoujaes/half-of-a-double
HT1R heavy riff (Mesa Rectifier 2x12 used, SM57) -